ADINA Publications

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The Theory used in ADINA is richly documented in the following books by K.J. Bathe and co-authors


Finite Element Procedures
 

Finite Element Procedures in Engineering Analysis

Numerical Methods in Finite Element Analysis
 


The Mechanics of Solids and Structures — Hierarchical ...


The Finite Element Analysis of Shells — Fundamentals


Inelastic Analysis of Solids and Structures

 
 
To Enrich Life
(Sample pages here)
 

 

Following are more than 700 publications — that we know of — with reference to the use of ADINA. The pages give the Abstracts of some papers published since 1986 referring to ADINA. The most recent papers are listed first. All these papers may be searched using the box:

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Finite-element modelling of thermo-mechanical stress distribution in laser beam ceramic tile grout sealing process

A. Liaqat, S. Safdar, and M.A. Sheikh

School of Mechanical, Aerospace, and Civil Engineering, University of Manchester, Manchester, UK

Proc. IMechE Vol. 220 Part C: J. Mechanical Engineering Science, 2006

Abstract: Laser tile grout sealing is a special process in which voids between the adjoining ceramic tiles are sealed by a laser beam. This process has been developed by Lawrence and Li using a customized grout material and a high power diode laser (HPDL). The process has been optimally carried out at laser powers of 60–120 W and at scanning speeds of 3–15 mm/s. Modelling of the laser tile grout sealing process is a complex task as it involves a moving laser beam and five different materials: glazed enamel, grout material, ceramic tile, epoxy bedding, and ordinary Portland cement substrate. This article presents the finite element model (FEM) of the laser tile grout sealing process. The main aim of this model is to accurately predict the thermo-mechanical stress distribution induced by the HPDL beam in the process. For an accurate representation of the process, the laser was modelled as a moving heat source. A three-dimensional transient thermal analysis was carried out to determine the temperature distribution. Temperature-dependent material properties and latent heat effects, due to melting and solidification of the glazed enamel, were taken into account in the FEM, thereby allowing a more realistic and accurate thermal analysis. The results of the thermal analysis were used as an input for the stress analysis with temperature-dependent mechanical properties. The results obtained from the FEM are compared with the published experimental results.

Keywords: laser tile grout sealing - finite-element modelling - thermo-mechanical analysis

Fluid structure interaction of patient specific abdominal aortic aneurisms: A comparison with solid stress models

Leung, James H. (Department of Chemical Engineering, Imperial College of London); Wright, Andrew R.; Cheshire, Nick; Crane, Jeremy; Thom, Simon A.; Hughes, Alun D.; Xu, Yun Source: BioMedical Engineering Online, v 5, May 19, 2006, p 33

ISSN: 1475-925X CODEN: BEOIBY

Publisher: BioMed Central Ltd.

Abstract: Background: Abdominal aortic aneurysm (AAA) is a dilatation of the aortic wall, which can rupture, if left untreated. Previous work has shown that, maximum diameter is not a reliable determinant of AAA rupture. However, it is currently the most widely accepted indicator. Wall stress may be a better indicator and promising patient specific results from structural models using static pressure, have been published. Since flow and pressure inside AAA are non-uniform, the dynamic interaction between the pulsatile flow and wall may influence the predicted wall stress. The purpose of the present study was to compare static and dynamic wall stress analysis of patient specific AAAs. Method: Patient-specific AAA models were created from CT scans of three patients. Two simulations were performed on each lumen model, fluid structure interaction (FSI) model and static structural (SS) model. The AAA wall was created by dilating the lumen with a uniform 1.5 mm thickness, and was modeled as a non-linear hyperelastic material. Commercial finite element code Adina 8.2 was used for all simulations. The results were compared between the FSI and SS simulations. Results: Results are presented for the wall stress patterns, wall shear stress patterns, pressure, and velocity fields within the lumen. It is demonstrated that including fluid flow can change local wall stresses slightly. However, as far as the peak wall stress is concerned, this effect is negligible as the difference between SS and FSI models is less than 1%. Conclusion: The results suggest that fully coupled FSI simulation, which requires considerable computational power to run, adds little to rupture risk prediction. This justifies the use of SS models in previous studies. © 2006 Leung et al; licensee BioMed Central Ltd. (52 refs.)

Keywords:  Fluid structure interaction  -  Stress analysis  -  Wall flow  -  Structural analysis  -  Finite element method  -  Mathematical models  -  Computer simulation

Secondary Keywords:  Abdominal aortic aneurysm (AAA)  -  Dilatation  -  Wall stress

 


Blood flow dynamics and arterial wall interaction in a saccular aneurysm model of the basilar artery

Valencia, Alvaro (Department of Mechanical Engineering, Universidad de Chile, Castilla); Solis, Francisco Source: Computers and Structures, v 84, n 21, August, 2006, p 1326-1337

ISSN: 0045-7949 CODEN: CMSTCJ

Publisher: Elsevier Ltd

Abstract: Blood flow dynamics under physiologically realistic pulsatile conditions plays an important role in the growth, rupture and surgical treatment of intracranial aneurysms. This paper describes the flow dynamics and arterial wall interaction in a representative model of a terminal aneurysm of the basilar artery, and compares its wall shear stress, pressure, effective stress and wall deformation with those of a healthy basilar artery. The arterial wall was assumed to be elastic or hyperelastic, isotropic, incompressible and homogeneous. The flow was assumed to be laminar, Newtonian, and incompressible. The fully coupled fluid and structure models were solved with the finite elements package ADINA. The intra-aneurysmal pulsatile flow shows single recirculation region during both systole and diastole. The pressure and shear stress on the aneurysm wall exhibit large temporal and spatial variations. The wall thickness, the Young's modulus in the elastic wall model and the hyperelastic Mooney-Rivlin wall model affect the aneurysm deformation and effective stress in the wall especially at systole. © 2006 Elsevier Ltd. All rights reserved. (31 refs.)

Keywords:  Biological organs  -  Computational fluid dynamics  -  Mathematical models  -  Physiology  -  Incompressible flow  -  Elastic moduli  -  Shear stress

Secondary  Keywords:  FSI  -  Intracranial aneurysm  -  WSS

 


Finite element analysis of mircopump with fluid and structure interaction

Zang, Qing (University of Science and Technology of China); Wang, Qimin; Li, Yukang Source: Zhongguo Jixie Gongcheng/China Mechanical Engineering, v 17, n 6, Mar 25, 2006, p 583-586 Language: Chinese

ISSN: 1004-132X CODEN: ZJGOE8

Publisher: China Mechanical Engineering Magazine Office

Abstract: In the experiments, ADINA was used to carry on finite element analysis. Taking both the structural and the fluid characteristics into consideration, the influence factors such as frequency and magnitude of inspiritment, density and viscosity of liquid for the application of piezoelectricity micropumps were studied. Appropriate frequency of inspiritment and transmission liquid are chosen in the design of micropumps on the basis of those factors. (8 refs.)


3D FE analysis of flexible pavement with geosynthetic reinforcement

Saad, Bassam (Dept. of Mining, Metals and Materials Engineering, McGill Univ.); Mitri, Hani; Poorooshasb, Hormoz Source: Journal of Transportation Engineering, v 132, n 5, May, 2006, p 402-415

ISSN: 0733-947X

Publisher: American Society of Civil Engineers

Abstract: A series of finite element (FE) simulations are carried out to evaluate the benefits of integrating a high modulus geosynthetic into the pavement foundation. The simulations are conducted under a parametric study to investigate the beneficial effects of geosynthetic reinforcement to the fatigue and rutting strain criteria, and to determine how such effects are influenced by the base quality and thickness as well as the subgrade quality. Three locations of the geosynthetic reinforcement are studied, namely the base-asphalt concrete interface, the base-subgrade interface, and inside the base layer at a height of 1/3 of its thickness from the bottom. It is found that placing the geosynthetic reinforcement at the base-asphalt concrete interface leads to the highest reduction of the fatigue strain (46-48%). The placement of geosynthetic reinforcement in thin bases is particularly effective; the highest decrease of rutting strain (16-34%) occurs when the reinforcement is placed at a height of 1/3 of the base thickness from the bottom. The study is carried out with the finite element program ADINA using a three-dimensional (3D) dynamic modeling technique with implicit solution scheme. © 2006 ASCE. (41 refs.)

Keywords:  Asphalt pavements  -  Flexible structures  -  Geosynthetic materials  -  Reinforcement  -  Interfaces (materials)  -  Elastoplasticity  -  Fatigue of materials  -  Strain  -  Finite element method  -  Computer simulation

Secondary  Keywords:  Flexible pavements  -  Geosynthetic reinforcement  -  Dynamic analysis  -  Rutting strain criteria

 


Simulation and research of electromagnetic sheet metal process

Wang, Li-Feng (National Die and Mould CAD Engineering Research Center, Shanghai Jiaotong University); Huang, Shang-Yu Source: Xitong Fangzhen Xuebao / Journal of System Simulation, v 18, n 3, March, 2006, p 757-759 Language: Chinese

ISSN: 1004-731X CODEN: XFXUFS

Publisher: Acta Simulata Systematica Sinica

Abstract: Electromagnetic forming (EMF) is a kind of high energy rate forming. EMF process analysis is the foundation of theoretical analysis. A numerical modeling of the electromagnetic sheet metal process was performed using a finite element method, and the boundary conditions and the loads of magnetic pressure of the analysis model were established according to theoretical analysis of the magnetic field properties. The numerical simulations on free bulging were carried out by use of the FEA program ADINA. The dynamic deformation process of sheet metal on the EMF was investigated. At last, the correctness of simulation results was bulging; bulging; verified. (11 refs.)

 

Thin bio-artificial tissues in plane stress: the relationship between cell and tissue strain, and an improved constitutive model

J. Pablo Marquez,1 Guy M. Genin,1 George I. Zahalak,1 and Elliot L. Elson2

1Department of Mechanical Engineering, and
2Department of Biochemistry and Molecular Biophysics, Washington University, St. Louis, Missouri 63130

Biophysical Journal Volume 88 February 2005 765–777 765

Abstract: Constitutive models are needed to relate the active and passive mechanical properties of cells to the overall mechanical response of bio-arti.cial tissues. The Zahalak model attempts to explicitly describe this link for a class of bioartificial tissues. A fundamental assumption made by Zahalak is that cells stretch in perfect registry with a tissue. We show this assumption to be valid only for special cases, and we correct the Zahalak model accordingly. We focus on short-term and very long-term behavior, and therefore consider tissue constituents that are linear in their loading response (although not necessarily linear in unloading). In such cases, the average strain in a cell is related to the macroscopic tissue strain by a scalar we call the ‘‘strain factor’’. We incorporate a model predicting the strain factor into the Zahalak model, and then reinterpret experiments reported by Zahalak and co-workers to determine the in situ stiffness of cells in a tissue construct. We find that, without the modification in this article, the Zahalak model can underpredict cell stiffness by an order of magnitude.

 

Invariant formulation for dispersed transverse isotropy in aortic heart valves: An efficient means for modeling fiber splay

Alan D. Freeda,b, Daniel R. Einsteinc, Ivan Veselyd

aBio Science and Technology Branch, MS 49-3, NASA’s John H. Glenn Research Center at Lewis Field, 21000 Brookpark Road, Cleveland, OH 44135, USA
bDepartment of Biomedical Engineering, ND-20, The Cleveland Clinic Foundation, 9500 Euclid Avenue, Cleveland, OH 44195, USA
cEnvironmental Molecular Sciences Laboratory, MS P7-56, Paci.c Northwest National Laboratory, 790 Sixth Street, Richland, WA 99354, USA
dCardiothoracic Surgery Research, Saban Research Institute, MS 66, Children’s Hospital Los Angeles, 4650 Sunset Boulevard, Los Angeles, CA 90027, USA

Biomechan Model Mechanobiol (2005) 4: 100–117

Abstract: Most soft tissues possess an oriented architecture of collagen fiber bundles, conferring both anisotropy and nonlinearity to their elastic behavior. Transverse isotropy has often been assumed for a subset of these tissues that have a single macroscopicallyidentifiable preferred .ber direction. Micro-structural studies, however, suggest that, in some tissues, collagen fibers are approximately normally distributed about a mean preferred fiber direction. Structural constitutive equations that account for this dispersion of fibers have been shown to capture the mechanical complexity of these tissues quite well. Such descriptions, however, are computationally cumbersome for two-dimensional (2D) fiber distributions, let alone for fully three-dimensional (3D) fiber populations. In this paper, we develop a new constitutive law for such tissues, based on a novel invariant theory for dispersed transverse isotropy. The invariant theory is derived from a novel closed-form ‘splay invariant’ that can easily handle 3D fiber populations, and that only requires a single parameter in the 2D case. The model fits biaxial data for aortic valve tissue as accurately as the standard structural model. Modification of the fiber stress–strain law requires no reformulation of the constitutive tangent matrix, making the model flexible for different types of soft tissues. Most importantly, the model is computationally expedient in a finite-element analysis, demonstrated by modeling a bioprosthetic heart valve.

 

Fluid-Structure Coupled CFD Simulation of the Left Ventricular Flow During Filling Phase

Yongguang Cheng,1 Herbert Oertel,2 And Torsten Schenkel2

1State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, 430072 Wuhan, China and
2Institute of Fluid Mechanics, University of Karlsruhe, 76128 Karlsruhe, Germany

Annals of Biomedical Engineering, Vol. 33, No. 5, May 2005,  pp. 567–576

Abstract: The fluid-structure coupled simulation of the heart, though at its developing stage, has shown great prospect in heart function investigations and clinical applications. The purpose of this paper is to verify a commercial software based fluidstructure interaction scheme for the left ventricular filling. The scheme applies the finite volume method to discretize the arbitrary Lagrangian–Eulerian formulation of the Navier–Stokes equations for the fluid while using the nonlinear finite element method to model the structure. The coupling of the fluid and structure is implemented by combining the fluid and structure equations as a unified system and solving it simultaneously at every time step. The left ventricular filling flow in a three-dimensional ellipsoidal thin-wall model geometry of the human heart is simulated, based on a prescribed time-varying Young’s modulus. The coupling converges smoothly though the deformation is very large. The pressure–volume relation of the model ventricle, the spatial and temporal distributions of pressure, transient velocity vectors as well as vortex patterns are analyzed, and they agree qualitatively and quantitatively well with the existing data. This preliminary study has verified the feasibility of the scheme and shown the possibility to simulate the left ventricular flow in a more realistic way by adding a myocardial constitutive law into the model and using a more realistic heart geometry.

Keywords: Fluid-structure interaction - Computational fluid dynamics - Left ventricular filling.

 

The difference of phase distributions in silicon after indentation with Berkovich and spherical indenters

I. Zarudia, L.C. Zhanga, W.C.D. Cheonga, T.X. Yub

aSchool of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, NSW 2006, Australia
bDepartment of Mechanical Engineering, Hong Kong, University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Acta Materialia 53 (2005) 4795–4800

Abstract: This study analyses the microstructure of monocrystalline silicon after indentation with a Berkovich and spherical indenter. Transmission electron microscopy on cross section view samples was used to explore the detailed distributions of various phases in the subsurfaces of indented silicon. It was found that an increase of the Pmax would promote the growth of the crystalline R8/BC8 phase at the bottom of the deformation zone. Microcracks were always generated in the range of the Pmax studied. It was also found that the deformation zones formed by the Berkovich and spherical indenters have very di.erent phase distribution characteristics. A molecular dynamics simulation and finite element analysis supported the experimental observations and suggested that the distribution of the crystalline phases in the transformation zone after indentation was highly stress-dependent.

Keywords: Nanoindentation - Silicon - Phase transformation - Stress

 

Aerodynamic transfer of energy to the vocal folds

Scott L. Thomson, Luc Mongeau, and Steven H. Frankel

Ray W. Herrick Laboratories, Purdue University, West Lafayette, Indiana 47907-1077

J. Acoust. Soc. Am. 118 _3_, Pt. 1, September 2005

Abstract: The aerodynamic transfer of energy from glottal airflow to vocal fold tissue during phonation was explored using complementary synthetic and numerical vocal fold models. The synthetic model was fabricated using a flexible polyurethane rubber compound. The model size, shape, and material properties were generally similar to corresponding human vocal fold characteristics. Regular, self-sustained oscillations were achieved at a frequency of approximately 120 Hz. The onset pressure was approximately 1.2 kPa. A corresponding two-dimensional finite element model was developed using geometry definitions and material properties based on the synthetic model. The finite element model upstream and downstream pressure boundary conditions were based on experimental values acquired using the synthetic model. An analysis of the fully coupled fluid and solid numerical domains included flow separation and unsteady effects. The numerical results provided detailed flow data that was used to investigate aerodynamic energy transfer mechanisms. The results support the hypothesis that a cyclic variation of the orifice profile from a convergent to a divergent shape leads to a temporal asymmetry in the average wall pressure, which is the key factor for the achievement of self-sustained vocal fold oscillations.

 

Computational Study on the Hemodynamics of the Bypass Shunt Directly Connecting the left Ventricle to a Coronary Artery

Eun Bo Shim1, Byung Jun Lee2, Hyung Jong Ko3

1Department of Mechanical Engineering, Kangwon National University, Hyoja-Dong, Chucheon, Kangwon-Do 200- 701, Republic of Korea
2The Research Institute of Mechanical Technology, Pusan National University, Jangjeon-Dong, Geumjeong-Gu, Busan 609-735, Republic of Korea
3Department of Mechanical Engineering, Kumoh National Institute of Technology, Shinpyung-Dong, Kumi, Kyungbuk 730-701, Republic of Korea

Journal of Mechanical Science and Technology(KSME Int. J.), Vol. 19, No. 5, pp. 1158-1168, 2005

Abstract: A shunt from the left ventricle to the left anterior descending artery is being developed for coronary artery occlusive disease, in which the shunt or conduit connects the the left ventricle (LV) with the diseased artery directly at a point distal to the obstruction. To aid in assessing and optimizing its benefit, a computational model of the cardiovascular system was developed and used to explore various design conditions. Computational fluid dynamic analysis for the shunt hemodynamics was also done using a commercial finite element package. Simulation results indicate that in complete left anterior descending artery (LAD) occlusion, flow can be returned to approximately 65% of normal, if the conduit resistance is equal for forward and reverse flow. The net coronary flow can increase to 80% when the backflow resistance is infinite. The increases in flow rate produced by asymmetric flow resistance are enhanced considerably for a partial LAD obstruction, since the primary effect of resistance asymmetry is to prevent leakage back into the ventricle during diastole. Increased arterial compliance has little effect on net flow with a symmetric shunt, but considerably augments it when the resistance is asymmetric. The computational results suggest that an LV-LAD conduit will be beneficial when the resistance due to artery stenosis exceeds 27 PRU, if the resistance is symmetric. Fluid dynamic simulations for the shunt flow show that a recirculating region generated near the junction of the coronary artery with the bypass shunt. The secondary flow is induced at the cutting plane perpendicular to the axis direction and it is in the attenuated of coronary artery.

Key Words: Computational Model - Coronary Circulation - LV-LAD Bypass Shunt - Lumped Parameter Model - Device Efficiency


Computational modeling of vascular clamping: A step toward simulating surgery

Chen, H.Y. (Dept. of Cardiothoracic Surgery, University of Southern California, Childrens Hospital Los Angeles); Einstein, D.R.; Chen, K.; Vesely, I. Source: Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings, v 7 VOLS, Proceedings of the 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005, 2005, p 302-303

ISSN: 0589-1019 CODEN: CEMBAD

Conference: 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005, Sep 1-4 2005, Shanghai, China

Publisher: Institute of Electrical and Electronics Engineers Inc.

Abstract: The objective of this study was to simulate clamping of the aorta. It is computationally demanding and involves contact between clamp and aorta, large deformations, and fluid-structure interactions (FSI). Models of the aortic root and clamp were created and solve in ADINA, a Finite Element Analysis package. The tissue model was created using a non-linear material. Fluid-structure interactions (FSI) were modeled. The deformation profile of the simulated aorta matched well with that of the real tissue. Clamping of a fluid-filled pressurized aorta, an important first step towards simulating of surgical procedures, was successfully modeled. The simulation was validated by clamping experiments. The modeling techniques developed are also applicable to p reoperative planning of cardiovascular surgery. © 2005 IEEE. (3 refs.)

Keywords:  Cardiovascular system  -  Cardiovascular surgery  -  Computation theory  -  Computer simulation  -  Deformation  -  Finite element method  -  Fluid structure interaction

Secondary Keywords:  Aorta  -  Aortic root  -  Surgical procedures  -  Reoperative planning

 

Hydrodynamic loading of vibrating micro-cantilevers

Basak, Sudipta (Dynamic Systems and Stability Lab., School of Mechanical Engineering, Purdue University); Raman, Arvind; Garimella, Suresh V. Source: American Society of Mechanical Engineers, Design Engineering Division (Publication) DE, v 118 A, n 1, Proceedings of the ASME Design Engineering Division 2005, 2005, p 443-452

CODEN: AMEDEH

Conference: Proceedings of the ASME Design Engineering Division 2005, Nov 5-11 2005, Orlando, FL, United States Sponsor: ASME Design Engineering Division

Publisher: American Society of Mechanical Engineers

Abstract: The hydrodynamic loading on silicon microcantilevers vibrating in different fluids close to (finite gap) and away from (infinite gap) a surface is analyzed numerically. Analytical techniques available to predict the hydrodynamic loading are restricted to simple cantilever geometries in fluids of infinite extent and are inaccurate for the higher modes of vibration. In this paper a finite element model developed in ADINA 8.1 (a fluid-structure interaction software, [1]) is used to overcome the shortcomings of the analytical models. Selective modal excitation of the cantilever in a fluid yields the corresponding modal frequency and damping factor. The numerical model benchmarks favorably with previously published experimental and analytical results. Detailed numerical analyses are performed in ADINA for variable gap lengths for a rectangular microcantilever for the first and second bending modes and the first torsional mode. Different cantilever geometries are also investigated. The results expose the physics of dissipation in the surrounding fluid and are expected to be of immediate interest to the Atomic Force Microscopy (AFM) and microcantilever biosensor communities. Copyright © 2005 by ASME. (14 refs.)

Keywords:  Silicon  -  Hydrodynamics  -  Vibrations (mechanical)  -  Surface properties  -  Mathematical models  -  Finite element method  -  Atomic force microscopy

Secondary  Keywords:  Hydrodynamic loading  -  Quality factor  -  Fluid-structure interaction  -  Microcantilever  -  Added mass

 


Temperature field analysis for heterogeneous material piston

Wang, Su (Dept. of Automobile Engineering, Beijing University of Aeronautics and Astronautics); Ni, Chunyang; Zhu, Xinxiong Source: Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics, v 31, n 12, December, 2005, p 1299-1302 Language: Chinese

ISSN: 1001-5965 CODEN: BHHDE8

Publisher: Beijing University of Aeronautics and Astronautics (BUAA)

Abstract: Physical and chemical performance of heterogeneous material part exceeds homogeneous material part. Because of material distributing complexity and insufficient study for heterogeneous material, there are lots of difficult in analysis of heterogeneous material part. Theory of composite performance and ADINA-T module of finite element analysis software ADINA were used to compute and analyze temperature field and heat dissipating capacity for heterogeneous material and common piston, using the gradient aluminum matrix composite piston reinforced by ceramic fibers and aluminum matrix composite piston reinforced by ceramic fibers (no grads) as examples. The results show this method can change piston temperature distribution, reduce heat dissipation capacity and relax the stress at interface of gradient aluminum matrix composite layer reinforced by ceramic fibers and piston noumenon which caused by mismatch between different coefficients of thermal expansion, using gradient aluminum matrix composite layer reinforced by ceramic fibers. (5 refs.)

Keywords:  Engines  -  Finite element method  -  Temperature distribution  -  Ceramic fibers  -  Thermal expansion  -  Heat losses  -  Thermal stress  -  Pistons  -  Computer simulation

Secondary  Keywords:  Heterogeneous material  -  Temperature field

 


Natural frequency analysis of liquid filled tanks

Amini, Rouzbeh (Department of Mechanical and Industrial Engineering, Northeastern University); Warner, Grant; Nayeb-Hashemi, Hamid Source: Proceedings of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference - DETC2005, v 1 A, Proc. of the ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conferences - DETC2005: 20th Biennial Conf. on Mechanical Vibration and Noise, 2005, p 883-887

ISBN-10: 0791847381

Conference: DETC2005: ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Sep 24-28 2005, Long Beach, CA, United States Sponsor: ASME Design Engineering Division;ASME Computers and Information in Engineering Division

Publisher: American Society of Mechanical Engineers

Abstract: Traditionally, the cantilever modal shape of liquid-filled tanks has been considered as the most critical mode. However, recent research has demonstrated that natural frequencies associated with some circumferential modes might be close to the frequency of earthquake excitation. This can lead to a resonance phenomenon, and consequently failure of the tanks. In this paper, we perform Natural Frequency Analysis of fluid-filled tanks, using finite element analysis. Modeling and solution employ ADINA potential-based flow elements, which require the assumption of inviscid, irrotational and incompressible flow. The problem is solved for different geometries and water levels of tanks; the results are compared with the current results in the literature and the difference is demonstrated. Copyright © 2005 by ASME. (22 refs.)

Keywords:  Water tanks  -  Natural frequencies  -  Earthquake effects  -  Electric excitation  -  Failure (mechanical)  -  Finite element method  -  Incompressible flow  -  Problem solving

Secondary Keywords:  Liquid filled tanks  -  Earthquake excitation  -  Flow elements

 



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