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Journal articles on the topic 'Finite element analysis of elastomeric bearings'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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1

Castillo Ruano, Pablo, and Alfred Strauss. "Finite Element Analysis for Nonlinear Unbonded Circular Fiber-Reinforced Elastomeric Bearings." Journal of Composites Science 5, no. 7 (June 29, 2021): 170. http://dx.doi.org/10.3390/jcs5070170.

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In recent years, interest in low-cost seismic isolation systems has increased. The replacement of the steel reinforcement in conventional elastomeric bearings for a carbon fiber reinforcement is a possible solution and has garnered increasing attention. To investigate the response of fiber-reinforced elastomeric bearings (FREBs) under seismic loads, it is fundamental to understand its mechanical behavior under combined vertical and horizontal loads. An experimental investigation of the components presents complexities due to the high loads and displacements tested. The use of a finite element analysis can save time and resources by avoiding partially expensive experimental campaigns and by extending the number of geometries and topologies to be analyzed. In this work, a numerical model for carbon fiber-reinforced bearings is implemented, calibrated, and validated and a set of virtual experiments is designed to investigate the behavior of the bearings under combined compressive and lateral loading. Special focus is paid to detailed modeling of the constituent materials. The elastomeric matrix is modeled using a phenomenological rheological model based on the hyperelastic formulation developed by Yeoh and nonlinear viscoelasticity. The model aims to account for the hysteretic nonlinear hyper-viscoelastic behavior using a rheological formulation that takes into consideration hyperelasticity and nonlinear viscoelasticity and is calibrated using a series of experiments, including uniaxial tension tests, planar tests, and relaxation tests. Special interest is paid to capturing the energy dissipated in the unbonded fiber-reinforced elastomeric bearing in an accurate manner. The agreement between the numerical results and the experimental data is assessed, and the influence of parameters such as shape factor, aspect ratio, vertical pressure, and fiber reinforcement orientation on stress distribution in the bearings as well as in the mechanical properties is discussed.

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2

Seki, Wataru, Yoshihide Fukahori, Yutaka Iseda, and Tsutomu Matsunaga. "A Large-Deformation Finite-Element Analysis for Multilayer Elastomeric Bearings." Rubber Chemistry and Technology 60, no. 5 (November 1, 1987): 856–69. http://dx.doi.org/10.5254/1.3536160.

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Abstract Finite element methods are applied for multilayer elastomeric bearings under large deformation. The method is capable of handling nonlinear elasticity and incompressibility of rubber-like materials. The strain energy density function which determines elastic properties of the materials is obtained empirically through strip biaxial testing. The computation using the strain energy density function is conducted to analyze the stress and strain distribution and the performance characteristics of multilayer elastomeric bearings, which is in good agreement with the results of actual experiments.

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3

Han, DongSeop, and MooHyun Kim. "The Effect of Reinforcing Plate on the Stiffness of Elastomeric Bearing for FPSO." Energies 13, no. 24 (December 16, 2020): 6640. http://dx.doi.org/10.3390/en13246640.

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The marine elastomeric bearing consists of an elastomer and several reinforcing inserted plates. Unlike land bearings that are to absorb high-frequency vibration during earthquakes, offshore elastomeric bearings are to support topside-module weight while efficiently absorbing wave-induced hull motions. The bearing is to receive three loads: compression, shear, and bending, and providing sufficient stiffness to resist the loads by inserting an adequate number of reinforcing plates is a major design issue for marine bearings. The stiffness of elastomeric bearings is largely influenced by the ratio of height to the area of the bearing and the number of laminated reinforcing plates. In this study, for the given size of the elastomeric bearing, the effect of the number of reinforcing plates on its compression, shear, and bending stiffness is investigated by using ANSYS Mechanical APDL, a commercial structural FE (finite element) analysis program. First, full analysis is done for the compression, shear, and bending stiffness with increasing respective displacements and the number of reinforcing plates from 0 to 8. The numerical results are partly validated by authors’ experimental results. Based on the numerical results, several empirical formulas are suggested for the variation of the three stiffnesses as a function of the number of reinforcing plates. Next, the design of the elastomer bearing for a representative FPSO (Floating Production Storage and Offloading) operated in the North Sea is conducted according to the required load and displacement conditions. Then, the adequate number of reinforcing plates for the case is determined and the results are shown to satisfy all the required safety factors for various required loading conditions.

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4

Masrar, Yassin, and Mohamed Ettaouil. "A nonlinear plane strain finite element analysis for multilayer elastomeric bearings." Applied Mathematics and Computation 404 (September 2021): 126218. http://dx.doi.org/10.1016/j.amc.2021.126218.

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5

Osgooei, Peyman M., Michael J. Tait, and Dimitrios Konstantinidis. "Three-dimensional finite element analysis of circular fiber-reinforced elastomeric bearings under compression." Composite Structures 108 (February 2014): 191–204. http://dx.doi.org/10.1016/j.compstruct.2013.09.008.

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6

Han, Dongseop, and Wooseong Che. "Comparison of the Shear Modulus of an Offshore Elastomeric Bearing between Numerical Simulation and Experiment." Applied Sciences 11, no. 10 (May 12, 2021): 4384. http://dx.doi.org/10.3390/app11104384.

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The most important item when indicating the mechanical properties of offshore elastomeric bearings is the shear modulus, and the method of measuring this is shown in EN 1337-3, a regulation related to offshore elastomeric bearings. In this work, we conducted an experimental and numerical study on an offshore elastomeric bearing to find its shear modulus. Shear modulus tests were conducted according to the procedure specified in EN 1337-3 Annex F, while simulations were performed using the finite element analysis (FEA) software, ANSYS. The main objective of this research work is to determine optimum analysis conditions for the simulation method that considers a nonlinear model for the elastomer material and predicts the experimental results accurately. We considered the Mooney–Rivlin (M-R) model that has two-parameter (2P), five-parameter (5P), and nine-parameter (9P) forms, depending on the number of terms in the series. We observed that the load-displacement graph is linear, and the percentage error between the results obtained with 2P and 5P M-R models is around 2.23% in the compression and 0.38% in the shear. The simulation results from 2P M-R model showed a good agreement with the experimental results with the correlation coefficient (R2) being 0.999 with an average error of about 2%. However, the deviation between the experimental and simulation results from the 9P M-R model is very high, with about 7%. Based on this study, we can say that the 2P M-R model can accurately predict the nonlinear behavior of hyperelastic material used in elastomer bearing. In addition, the shear modulus of elastic bearings for Class 3 Shore hardness was verified by comparing the numerical simulation values with those presented in EN 1337-3 Annex D.

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7

Mustafa, Samim, Hidehiko Sekiya, and Chitoshi Miki. "Determining the location of sensors for seismic damage detection in steel girder bridges with elastomeric bearings." Journal of Vibration and Control 26, no. 19-20 (February 3, 2020): 1779–90. http://dx.doi.org/10.1177/1077546320905176.

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In planning a bridge health monitoring with minimum sensors for long-term monitoring, it is necessary to accurately predict the bridge behavior including its nonlinearity and identify the damaged bridge components when a strong earthquake strikes. This article presents a methodology for the selection of sensors and their arrangement for detecting seismic damage in an in-service steel plate girder bridge system. In this study, a detailed span-based model was developed for the finite element simulation including the effect of the rubber bearing and piers, and the damage control by the side blocks. The finite element dynamic simulation was carried out with input earthquake acceleration to investigate the seismic behavior and grasp the damageable parts during an earthquake. Based on the results of finite element dynamic simulation, a fault tree analysis was carried out to reveal more about the bridge behavior, the failure modes, and the occurrence of damage. It was found that the side block, the bearing stiffener, and the horizontal bracing on the fixed side of the bridge are most important to be monitored for the evaluation of soundness of a plate girder bridge immediately after an earthquake. Finally, a sensor arrangement for the bridge was proposed based on the analysis results.

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8

CARDOSO, M. T. S. A., and M. C. V. LIMA. "Wind load effect on the lateral instability of precast beams on elastomeric bearing supports." Revista IBRACON de Estruturas e Materiais 13, no. 3 (June 2020): 593–602. http://dx.doi.org/10.1590/s1983-41952020000300009.

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Abstract The behavior of slender precast beams related to lateral stability in the transitional and in service phases is worrying. The presence of geometric imperfections aggravates and makes the problems of instability more susceptible. The main objective of this work is to evaluate the behavior of concrete beams on elastomeric bearings and to analyze the influence of variables such as: concrete strength, wind load and bearing compression stiffness. For the numerical nonlinear analysis the software ANSYS based on the Finite Element Method was used. The analyses show that the influence of the strength of the concrete is significant in the lateral stability of the beam. The wind load represents a considerable decrease in the contact (lift off) between the beam and the bearing. Finally, the combination of these factors can result in a critical stress situation in the beam, and it is not possible to have equilibrium, causing its toppling.

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9

Kawatani, Mitsuo, Chul-Woo Kim, and Naoki Kawada. "Three-Dimensional Finite Element Analysis for Traffic-Induced Vibration of a Two-Girder Steel Bridge with Elastomeric Bearings." Transportation Research Record: Journal of the Transportation Research Board 11s (January 2005): 225–33. http://dx.doi.org/10.3141/trr.11s.73810433r38j6702.

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10

Sequera Gutierrez, Diego, Luis Felipe Solano Rodríguez, Edgar Eduardo Muñoz Díaz, Yezid Alexander Alvarado Vargas, Jesús Daniel Villalba Morales, and Isabel Gasch Molina. "Updating the finite element model of a Colombian Bridge with Ansys." DYNA 87, no. 212 (January 1, 2020): 209–18. http://dx.doi.org/10.15446/dyna.v87n212.79785.

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Updating structural model is a knowledge field that have been studied in the last decades to guarantee the reliability on the model defined to represent the behavior of a structure, but generally implies the use of different software to carry out the different parts of the process. This paper presents the updating of the finite element model of a curve-alignment reinforced concrete bridge located near to the city of Ubaté in Colombia by using the optimization tool available in software Ansys and ambient vibration measurements. The use of such type of information avoids to carry out forced-vibration test, which affect the normal operation of the bridge. The objective function corresponds to the minimization of the error between analytical and experimental natural frequencies of the bridge. The design variables correspond to the material properties of the concrete and the elastomeric bearings. Results show that the error was decreased to less than 2%. The sensibility analysis allowed to determine which variables are more sensible to affect the natural frequencies in the structure.

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11

Hou, Xi, Chong Chang Yang, and Sheng Ze Wang. "Dynamic Modeling and Modal Analysis of the High-Speed Winder Spindle." Applied Mechanics and Materials 281 (January 2013): 263–67. http://dx.doi.org/10.4028/www.scientific.net/amm.281.263.

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A model of the spindle which is one of key parts of the high-speed winder is presented in this paper. A cantilever type hollow bobbin, a flexible shaft, bearings, Elastomer O-Rings and the frame is included in the model. Comparison between the 3D finite solid element model and the beam element model is made in the modal analysis. Critical speeds and the corresponding whirling motions are obtained from the beam finite element model considering the effect of rotatory inertia, gyroscopic moments, and the damping. The dynamic analysis mentioned above is implemented by using the finite element software ANSYS. Calculation results in this paper facilitate the following dynamic analysis and a foundation for the performance improvement of the high-speed winder.

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12

Wang, R. Z., S. K. Chen, K. Y. Liu, C. Y. Wang, K. C. Chang, and S. H. Chen. "Analytical Simulations of the Steel-Laminated Elastomeric Bridge Bearing." Journal of Mechanics 30, no. 4 (June 6, 2014): 373–82. http://dx.doi.org/10.1017/jmech.2014.24.

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AbstractIn this paper, analytical simulations of the steel-laminated elastomeric bearing (SLEB) using a three-dimensional (3D) finite element model incorporating material, geometric nonlinearities, and a frictional contact algorithm in LS-DYNA code is conducted. In order to simulate the nonlinear responses of the elastomeric bearing under the compression and shear, a hyperviscoelastic rubber model such as The MAT_77_H (MAT_HYPERVISCOELASTIC_RUBBER) in LS- DYNA code is adopted. Based on the proposed material model for the SLEB, the interaction effects of the SLEB under compression, bending, and torsion are analyzed. Analytical results are compared with the test results of the SLEBs. A set of material parameters is proposed for 3D FEM analysis of SLEBs. The proposed material model demonstrates its accuracy.

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13

KRAHL, P. A., R. CARRAZEDO, and M. K. EL DEBS. "Rollover stability of precast concrete beams supported by elastomeric bearing pads." Revista IBRACON de Estruturas e Materiais 10, no. 6 (November 2017): 1192–204. http://dx.doi.org/10.1590/s1983-41952017000600005.

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Abstract During construction of precast girder bridges, there is the concern on rollover instability of the beams when exclusively supported by elastomeric bearing pads. This type of failure has been the focus of recent research due several accidents reported. However, these studies have not considered the nonlinear behavior of elastomeric bearing pads and the lift-off effect. Therefore, this paper presents a parametric study with a finite element model calibrated with experimental results, reported in the literature, through a nonlinear geometrical analysis and considering that concrete behaves linearly. Besides, the experimental results are compared to simplified approaches which account the pad nonlinear behavior and the lift-off effect by utilizing its secant rotational stiffness. From the results, the difference between the instability load from nonlinear geometrical analysis and experimental results was 8.7 %, and the simplified eigenvalue solution and experimental was 11.4 %, which was the best fit compared to the other existing analytical models. From the parametrical analysis, the instability load was considerably decreased by varying the initial lateral deflection, the skewed pad rotation, top flange width and the span of the beam.

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14

SONEJI, B. B., and R. S. JANGID. "EFFECTIVENESS OF SEISMIC ISOLATION FOR CABLE-STAYED BRIDGES." International Journal of Structural Stability and Dynamics 06, no. 01 (March 2006): 77–96. http://dx.doi.org/10.1142/s0219455406001836.

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This paper investigates the effectiveness of elastomeric and sliding types of isolation systems for the seismic response control of cable-stayed bridges. A simplified two-dimensional lumped-mass finite-element model of the Quincy Bay-view Bridge at Illinois was developed for the investigation. The seismic isolation of cable-stayed bridges is achieved using three different isolators, namely, high damping rubber bearings (HDRB), lead rubber bearings (LRB) and friction pendulum system (FPS). Time history analysis is performed for the bridge with four different earthquake ground motions applied in the longitudinal direction using Newmark's method with linear variation of acceleration over the time interval. The seismic response of the isolated cable-stayed bridge is compared with that of the bridge with no isolation system. The results show that the isolation systems are effective for reducing the absolute acceleration of the deck and the base shear response of the tower. Further, a parametric study is performed by varying the damping ratio, yield strength and friction coefficient of HDRB, LRB and FPS to investigate the influence of these parameters on the seismic response of the bridge. From such a study, optimal values can be found for the isolators for reducing the bridge responses.

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15

Kasimzade, Azer A., Obaidullah Abrar, Mehmet Kuruoglu, and Gencay Atmaca. "New Structural Seismic Isolation for Nuclear Containment Structures." Science and Technology of Nuclear Installations 2020 (February 20, 2020): 1–15. http://dx.doi.org/10.1155/2020/9573653.

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The new Structural Seismic Isolation System (SSIS) intends to provide high safety for important structures such as nuclear power plants, offshore oil platforms, and high-rise buildings against near-fault and long-period earthquakes. The presented SSIS structure foot base and foundation contact surfaces have been designed as any curved surfaces (spherical, elliptical, etc.) depending on the earthquake-soil-superstructure parameters, and these contact surfaces have been separated by using elastomeric (lead core rubber or laminated rubber bearings with up to 4-second period) seismic isolation devices. It would allow providing inverse pendulum behavior to the structure. As a result of this behavior, the natural period of the structure will possess greater intervals which are larger than the predominant period of the majority of the possible earthquakes including near-fault zones. Consequently, the structure can maintain its serviceability after the occurrence of strong and long-period earthquakes. This study has investigated the performance of the SSIS for the nuclear containment (SSIS-NC) structure. The finite element model of SISS-NC structure has been developed, and nonlinear dynamic analysis of the model has been conducted under the strong and long-period ground motions. The results have been presented in comparison with the conventional application method of the seismic base isolation devices for nuclear containment (CAMSBID-NC) and fixed base nuclear containment (FB-NC) structures. The base and top accelerations, effective stress, and critical shear stress responses of the SSIS-NC structure are 48.67%, 36.70%, and 32.60% on average lower than those of CAMSBID-NC structure, respectively. The result also confirms that the SSIS-NC structure did not cause resonant vibrations under long-period earthquakes. On the other hand, there is excessive deformation in the isolation layers of CAMSBID-NC structure.

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16

Xiao, Jian Chun, Peng Liu, and Ke Jian Ma. "Finite Deformation Stiffness of Sliding Elastomeric Bearings." Advanced Materials Research 374-377 (October 2011): 1858–62. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.1858.

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Anchor bolts are set in some elastomeric bearings of large-span column-supported spatial steel roofs. Besides helping the bearing in-site assembly, the bolts play the roles of sliding position limitation and vertical anchorage. To analyze the effect of bearings on nonlinear structural behavior, the bearing stiffness change is studied just before and after the elastomer pad is in contact with the bolts. For the bearing that the pad is glued with the top/bottom steel plates, three kinds of relation of pad and bolts are discussed and an approximate horizontal stiffness formula is obtained with parametric analysis method. Based on the analysis results a stiffness expression for sliding elastomeric bearings is deduced. To solve the computational problem caused by the bearing stiffness changes, an improved imbalance force vector formula is proposed. Case study shows that the bolts have influence upon the computed results more significantly.

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17

Weiser, Stephan, Thomas Lehmann, Ralf Landgraf, Niels Goldberg, Hendrik Donner, and Jörn Ihlemann. "Experimental and numerical analysis of cord–elastomer composites." Journal of Rubber Research 24, no. 2 (May 26, 2021): 211–25. http://dx.doi.org/10.1007/s42464-021-00091-x.

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AbstractIn this paper, experimental and numerical investigations on cord–elastomer composites are presented. A finite-element model is introduced, which was developed within the framework of an industrial project. The model is able to simulate an elastomer matrix with inserted cords as load bearing elements and to predict the strains and stresses in cord and elastomer sections. The inelastic material behavior of the elastomer matrix and the yarns is described by corresponding material models suitable for large deformation processes. With the help of a specially developed demonstrator bellows, which is similar to an air spring, the simulation results are compared with experiments. For this purpose, the digital image correlation method is used to determine the deformations on the outer surface of the demonstrator bellows and to calculate the strains on and between the cords. The comparison of the results shows that the employed simulation method is very well suited to predict the strains in these cord–elastomer composites.

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18

Kakavas, P. A., G. I. Giannopoulos, and N. K. Anifantis. "Mixed Finite Element Analysis of Elastomeric Butt-Joints." Journal of Engineering Materials and Technology 129, no. 1 (September 27, 2005): 11–18. http://dx.doi.org/10.1115/1.2400254.

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This paper presents a mixed finite element formulation approximating large deformations observed in the analysis of elastomeric butt-joints. The rubber has been considered as nearly incompressible continuum obeying the Mooney/Rivlin (M/R) strain energy density function. The parameters of the model were determined by fitting the available from the literature uniaxial tension experimental data with the constitutive equation derived from the M/R model. The optimum value of the Poisson ratio is adjusted by comparing the experimentally observed diametral contraction of the model with that numerically obtained using the finite element method. The solution of the problem has been obtained utilizing the mixed finite element procedure on the basis of displacement/pressure mixed interpolation and enhanced strain energy mixed formulation. For comparison purposes, an axisymmetric with two-parameter M/R model and a three-dimensional (3D) with nine-parameters M/R model of the butt-joint are formulated and numerical results are illustrated concerning axisymmetric or general loading. For small strains the stress and/or strain distribution in the 2D axisymmetric butt-joint problem was compared with derived analytical solutions. Stress distributions along critical paths are evaluated and discussed.

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19

Warn, Gordon P., and Jared Weisman. "Parametric finite element investigation of the critical load capacity of elastomeric strip bearings." Engineering Structures 33, no. 12 (December 2011): 3509–15. http://dx.doi.org/10.1016/j.engstruct.2011.07.013.

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20

Lau, John H., and Albert H. Jeans. "Nonlinear Analysis of Elastomeric Keyboard Domes." Journal of Applied Mechanics 56, no. 4 (December 1, 1989): 751–55. http://dx.doi.org/10.1115/1.3176168.

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The large deflection of an elastomeric dome is studied using the finite element method. The material properties of the elastomer are described by a hyperelastic model in order to capture the strain energy stored in the dome during deformation. The nonlinear responses are determined by the modified Riks procedure, and the calculated load-deflection curve agrees well with experimental results. In addition, a pressurized thick-walled spherical hyperelastic shell is analyzed and the stress results obtained by the finite element method are in excellent agreement with the closed-form solutions. The results provide a better understanding of the mechanical behavior of elastomeric keyboard domes and demonstrate the feasibility of using the finite element method to design such structures.

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21

Belostotsky, Alexander M., and Andrei S. Pavlov. "Finite Element Simulation of Stability and Resistance to Extreme Loads of Braced Shell with Elastomeric Bearings." Applied Mechanics and Materials 709 (December 2014): 190–95. http://dx.doi.org/10.4028/www.scientific.net/amm.709.190.

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22

Liu, Hong Bin, Lei Zhang, and Yong Sheng Shi. "Dynamic Finite Element Analysis for Tapered Roller Bearings." Applied Mechanics and Materials 533 (February 2014): 21–26. http://dx.doi.org/10.4028/www.scientific.net/amm.533.21.

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Based on the finite element method of explicit dynamics and contact dynamics mechanics, a three dimensional solid finite element model was developed introducing physical elements for tapered roller bearing. The dynamic process numerical simulation of tapered roller bearing was carried out in ABAQUS. The vibration curves of the nodes on roller were drew. The changes of contact stress and contact stress distribution of rings, rollers and the cage in the process were analyzed. The results show it is basically consistent with the actual movement of rolling bearings.

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23

Wei, Yan Gang, and Yan Kui Liu. "Finite Element Analysis of the Roller Bearing Used in Rolling Mill." Applied Mechanics and Materials 367 (August 2013): 141–44. http://dx.doi.org/10.4028/www.scientific.net/amm.367.141.

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The loading roller number and maximum stress of the bearings can not be calculated accurately through conventional methods because support manner of the roller bearings used in rolling mill is different from that of the roller bearings used in conventional condition. Based on characteristic of the bearings, the model of the bearing is made combining contact mechanics with finite element method. The loading roller number and maximum stress of the bearings are calculated through FEA. The work of this paper offers a reference to design and manufacture this kind of bearings.

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24

Wang, Lei, Chong Gao, Shi Jie Wang, Jing Zhao, and Li Li. "Finite Element Analysis of Thrust Bearing in ESPCP System." Advanced Materials Research 781-784 (September 2013): 2834–38. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.2834.

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Thrust bearing is one of the most important components in ESPCP system, which determines the life of the whole system under the restriction of some factors such as the installation depth and the viscosity of swabbed petroleum oil etc. To increase the ability of high temperature resistance of thrust bearings under the limited radial size, the damage reason of applied bearings was analyzed. Some different modified methods were employed on configuration and material. Contact problems were researched with finite element analysis software. Comparison of the analysis results shows that in the tube, it is optimum that 8 rollers thrust bearings are used in 10mm radial tube without holders.

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25

Nguyen, S. H. "p-Version Finite Element Analysis of Gas Bearings of Finite Width." Journal of Tribology 113, no. 3 (July 1, 1991): 417–20. http://dx.doi.org/10.1115/1.2920640.

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Steady-state compressible isothermal lubrication problems are analyzed by the p-version finite element formulation in conjunction with the Newton-Raphson iteration procedure. Test examples confirm that this is an effective formulation for solving finite width bearing problems, and that, even for high bearing number (Λx > 1000) and coarse mesh situations, numerical solutions are accurate and converge rapidly.

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26

Kim, M. J., A. Gupta, and A. H. Marchertas. "Finite element analysis of isolation bearings with viscoelastic properties." Computers & Structures 52, no. 3 (August 1994): 479–87. http://dx.doi.org/10.1016/0045-7949(94)90233-x.

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27

Zhang, Rui-jun, and Ai-qun Li. "Finite element study of effect of parameters on stress distribution of steel shim in elastomeric bearings." Advances in Structural Engineering 22, no. 9 (March 13, 2019): 2124–35. http://dx.doi.org/10.1177/1369433219834748.

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28

Rastgoo Moghadam, Saman, and Dimitrios Konstantinidis. "Finite element study of the effect of support rotation on the horizontal behavior of elastomeric bearings." Composite Structures 163 (March 2017): 474–90. http://dx.doi.org/10.1016/j.compstruct.2016.12.013.

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29

KINOUCHI, Kazuhiro, Katsuhiko TANAKA, Shinobu YOSHIMURA, and Genki YAGAWA. "Finite Element Analysis of Gas-Lubricated Grooved Journal Bearings (Analysis Method)." JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing 39, no. 1 (1996): 123–29. http://dx.doi.org/10.1299/jsmec1993.39.123.

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30

Toopchi-Nezhad, Hamid, Michael J. Tait, and Robert G. Drysdale. "Bonded versus unbonded strip fiber reinforced elastomeric isolators: Finite element analysis." Composite Structures 93, no. 2 (January 2011): 850–59. http://dx.doi.org/10.1016/j.compstruct.2010.07.009.

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31

Zhang, H., J. Li, and T. Peng. "Development and Mechanical Performance of a New Kind of Bridge Seismic Isolator for Low Seismic Regions." Shock and Vibration 20, no. 4 (2013): 725–35. http://dx.doi.org/10.1155/2013/148907.

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The concept of fibre-reinforced plate elastomeric isolator (FRPEI) is introduced firstly in this paper. Three FRPEI specimens have been constructed to evaluate the mechanical performance of the isolators by performing vertical and horizontal tests. The research focuses on the compression stiffness, the shear stiffness, the hysteretic characteristic and the vertical bearing capacity of the isolators. The experimental results show that the mechanical performance of FRPEIs can meet the requirements of bridge rubber bearings and the energy dissipation capacity is better than that of general laminated rubber bearings. Therefore, it is feasible to use FRPEIs in seismic isolation of short span bridges in low seismic regions. Theoretical and finite element methods have also been employed and the deformation assumptions applied in the theoretical method are also verified by FEM. By comparing the differences of the results of different methods, the effectivenesses of the theoretical and finite element methods are evaluated and some considerations on isolator design are proposed.

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32

Saarenheimo, Arja, Michael Borgerhoff, Kim Calonius, Anthony Darraba, Alexandre Hamelin, Sara Ghadimi Khasraghy, Amin Karbassi, et al. "Numerical studies on vibration propagation and damping test V1." Rakenteiden Mekaniikka 51, no. 1 (August 16, 2018): 55–80. http://dx.doi.org/10.23998/rm.68954.

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Earthquakes and aircraft impacts induce vibrations that propagate throughout the entire building and they need to be considered in designing SSCs (Structures, Systems and Components). Mainly linear calculation methods have been in use in design practice and the codes and standards consider damping ratios only for linear structural analyses. Induced vibrations, especially in damaged concrete structures, have not been studied extensively enough for optimization of structural frameworks and/or qualified systems and components. Experimental data on damping properties of damaged reinforced concrete are needed also for benchmarking analysis programs and methods. Recently, within IMPACT project, a new type of test series considering vibration propagation has been carried out at VTT. The test target is a reinforced concrete structure with two parallel walls connected to a floor slab. The front wall is additionally supported by triangular shaped side walls which are connected to the floor slab too. The test structure is supported on elastomeric bearing pads, with back pipes effective mainly in compression and with bars effective in tension. In order to obtain information on vibration propagation in damaged concrete structure at different levels of damage grades the same structure was tested six times. At each time the mass of the deformable stainless steel missile was 50 kg. The hit point located in the middle of the front wall. The impact velocity was about 110 m/s in the first four tests (V1A-D) and about 60 m/s in the remaining two tests (V1E and F). In this paper, numerical results on tests V1A and V1F are compared with the corresponding experimental ones. The calculated results, such as accelerations, displacements, their response spectra and strains, are compared with experimental measurements. Five finite element (FE) programs are used in computations: Abaqus, Europlexus, LS-DYNA, SOFiSTiK and an in-house code (IHC). Most of the FE-codes in the present study use shell elements. In Abaqus and SOFiSTiK non-linear behaviour of shell section is modelled by dividing the cross section into layers. Reinforcements are also modelled as layers. In Europlexus and IHC, an alternative approach is adopted in which the non-linear behaviour of concrete and reinforcement is homogenized beforehand in the shell thickness direction obtaining relations between stress resultants and generalized strains valid for the shell section. In LS-DYNA, 3D solid elements for modelling concrete and beam elements for modelling reinforcements are used. Equations of motion are integrated with explicit central difference time integration method, except in SOFiSTiK implicit integration method is used. Modelling and computations with the mentioned FE-programs are made independently of each other. Computations with LS-DYNA are carried out as blind exercises. Consideration of the results from benchmarking point of view is still on-going. However it is evident that analysed results follow reasonable well test results in main design parameter level such as maximum displacements, accelerations and strains. Also frequency spectra are estimated reasonably well.

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Horr, A. M., and L. C. Schmidt. "Frequency Domain Dynamic Analysis of Large Space Structures with Added Elastomeric Dampers." International Journal of Space Structures 11, no. 3 (September 1996): 279–89. http://dx.doi.org/10.1177/026635119601100301.

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Modern computer-based computational techniques such as the finite element method enable the structural dynamicist to make precise calculations of the mass and stiffness properties of complex large space structures (LSS). To obtain dissipation analysis up to the same level of sophisitcation as mass and stiffness analysis in damped structures, an equally accurate methodology is required. This paper presents one such methodology for LSS with added elastomeric dampers. Elastomeric dampers have been used in the different parts of LSS to absorb part of the vibrational energy, and to help reduce the damage caused by the dynamic forces. The purpose of this paper is to present the specturally formulated finite element analyses for damped LSS. Using the fractional derivative model, the non-linear damping characteristics of elastomeric dampers have been modelled.

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Qu, Yi, Chang Zheng Chen, and Bo Zhou. "Study on Fault Diagnosis of Wind Turbine Main Bearing Based on Finite Element Analysis and Wavelet Analysis." Advanced Materials Research 308-310 (August 2011): 1264–68. http://dx.doi.org/10.4028/www.scientific.net/amr.308-310.1264.

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A new method based on finite element analysis and wavelet analysis for the fault diagnosis of wind turbine main bearings is presented in the paper. Firstly, take example for low speed bearing, the three-dimension models of the good and fault bearings are set up, which was discussed with using finite element method. The stress, strain and contact stress distribution were computed by this method. Then the wavelet transform of data signals collected in experiment was carried out with db6 wavelet and 4 scales on the basis of the stress wave analysis. The frequency D3 and D4 signals were reconstructed and characteristic frequencies of stress waves with the simulative faults were extracted. It has been shown that the method applying finite element analysis and wavelet analysis is an efficient method for the fault diagnosis of wind turbine main bearings.

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Yoshida, Junji, Masato Abe, Yozo Fujino, and Hiroshi Watanabe. "Three-Dimensional Finite-Element Analysis of High Damping Rubber Bearings." Journal of Engineering Mechanics 130, no. 5 (May 2004): 607–20. http://dx.doi.org/10.1061/(asce)0733-9399(2004)130:5(607).

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San Andrés, Luis, and Deborah Wilde. "Finite element analysis of gas bearings for oil-free turbomachinery." Revue Européenne des Éléments Finis 10, no. 6-7 (January 2001): 769–90. http://dx.doi.org/10.1080/12506559.2001.9737570.

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Sarkar, S., A. Nandi, S. Neogy, J. K. Dutt, and T. K. Kundra. "Finite element analysis of misaligned rotors on oil-film bearings." Sadhana 35, no. 1 (February 2010): 45–61. http://dx.doi.org/10.1007/s12046-010-0005-1.

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Heinrich, Juan C., and Derry Connolly. "Three-dimensional finite element analysis of self-acting foil bearings." Computer Methods in Applied Mechanics and Engineering 100, no. 1 (October 1992): 31–43. http://dx.doi.org/10.1016/0045-7825(92)90113-x.

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Lovell, M. R., M. M. Khonsari, and R. D. Marangoni. "Frictional Analysis of MoS2 Coated Ball Bearings: A Three-Dimensional Finite Element Analysis." Journal of Tribology 119, no. 4 (October 1, 1997): 754–63. http://dx.doi.org/10.1115/1.2833881.

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A brief review of finite element contact and friction theory is presented for low-speed bearing operations. A three-dimensional finite element model is developed to realistically characterize the friction experienced by a coated ball bearing element. The finite elements results, which are obtained for various normal loads and ball materials, are verified using Hertzian contact theory and previous experimental tests performed by the authors. From the results, general trends for the frictional behavior of coated bearing surfaces are established and implications to the field of controls, as applied to precision positioning and tracking instruments are discussed.

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Gurvich, Mark R. "COHESIVE ELEMENT BASED ANALYSIS OF RUBBER AND ELASTOMERIC COMPOSITES." Rubber Chemistry and Technology 84, no. 3 (September 1, 2011): 354–65. http://dx.doi.org/10.5254/1.3577533.

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Abstract High fidelity damage evaluation of elastomeric products should be based on analysis of both cracking initiation and growth. Application of so-called cohesive elements in finite element analysis (FEA)-based fracture analysis seems to be a very promising approach to capture these processes in computationally efficient and physically adequate way. Recent results, for example, demonstrated unique capabilities of this approach for analysis of complex laminated elastomeric composites. Significant challenges, however, are still associated with the hyperelastic nature and corresponding nonlinear issues of rubber deformation. Thus, the objective of this study is development of a generalized method of cohesive element based modeling specifically for hyperelastic, highly nonlinear problems. An additional objective is demonstration of the method on examples of representative damage mechanisms and load conditions. The paper covers details of computational implementations and presents effects of nonlinearity on obtained solutions. Finally, results of representative parametric studies are summarized in the form of helpful recommendations for practical engineering analysis.

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TSAI, C. S. "FINITE ELEMENT FORMULATIONS FOR FRICTION PENDULUM SEISMIC ISOLATION BEARINGS." International Journal for Numerical Methods in Engineering 40, no. 1 (January 15, 1997): 29–49. http://dx.doi.org/10.1002/(sici)1097-0207(19970115)40:1<29::aid-nme47>3.0.co;2-a.

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Morman, Kenneth N., and Tsung Y. Pan. "Application of Finite-Element Analysis in the Design of Automotive Elastomeric Components." Rubber Chemistry and Technology 61, no. 3 (July 1, 1988): 503–33. http://dx.doi.org/10.5254/1.3536198.

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Abstract FEA provides more detailed information for design than can be possibly measured on an actual component part or computed using classical closed-form solutions. Based on this observation, FEA is an ideal means for developing concept designs. No parts are needed for FEA, while conceptual design evaluation using “cut and try” procedures of the past requires that component parts be molded for testing. Once a rough concept has been developed, FEA can be used more effectively to evaluate design modifications in less than the time required by “cut-and-try” iterations. The major benefit that is realizable from FEA is in time savings. Computer costs can be justified by factors such as efficiency and better component reliability and performance.

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Du, Kui, Xiang Ming Zhang, and Ze Long You. "Static Analysis of Viscoelastic Reinforced Thick-Walled Cylinder." Applied Mechanics and Materials 377 (August 2013): 38–42. http://dx.doi.org/10.4028/www.scientific.net/amm.377.38.

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The numerical simulation of the static response of viscoelastic materials with the finite element method is presented in this paper. In particular, elastomeric solids which are of essential engineering interest are discussed. A rubbery elastic manner is assumed to be modeled with an Ogden-type strain energy function. A Prony series represents the relaxation moduli is exploited. By using a general finite element software ANSYS, numerical examples illustrate relaxation and creeping phenomena.

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Li, Peng, Min Wang, Xiao Li Qi, Jian You Feng, Xiao Hui Liu, Run Qiu Tang, and Wen Ying Zhao. "Analysis of the Mechanical Properties of Slewing Bearings Using Finite Element Method." Applied Mechanics and Materials 224 (November 2012): 286–94. http://dx.doi.org/10.4028/www.scientific.net/amm.224.286.

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Slewing bearings are the basic structural components widely used in construction machinery industry. Their stress status and distribution have great influence on the service life. A finite element approach for a single-row slewing bearing is established based on the bilinear isotropic model. The stress status at different loading conditions is simulated with the bearing geometric and material parameters. The result shows that the numerical simulation is reasonable in comparison with the analytical result obtained by Hertz’s theory and provides reliable design guideline for slewing bearings.

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Marusak, Ronald E., and Eric B. Becker. "A finite element procedure for axisymmetric elastomeric solids under general loading." International Journal for Numerical Methods in Engineering 36, no. 12 (June 30, 1993): 2031–48. http://dx.doi.org/10.1002/nme.1620361206.

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He, Peiyu, Qinrong Qian, Yun Wang, Hong Liu, Erkuo Guo, and Hua Wang. "Influence of finite element mesh size on the carrying capacity analysis of single-row ball slewing bearing." Advances in Mechanical Engineering 13, no. 4 (April 2021): 168781402110090. http://dx.doi.org/10.1177/16878140211009030.

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Slewing bearings are widely used in industry to provide rotary support and carry heavy load. The load-carrying capacity is one of the most important features of a slewing bearing, and needs to be calculated cautiously. This paper investigates the effect of mesh size on the finite element (FE) analysis of the carrying capacity of slewing bearings. A local finite element contact model of the slewing bearing is firstly established, and verified using Hertz contact theory. The optimal mesh size of finite element model under specified loads is determined by analyzing the maximum contact stress and the contact area. The overall FE model of the slewing bearing is established and strain tests were performed to verify the FE results. The effect of mesh size on the carrying capacity of the slewing bearing is investigated by analyzing the maximum contact load, deformation, and load distribution. This study of finite element mesh size verification provides an important guidance for the accuracy and efficiency of carrying capacity of slewing bearings.

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Yang, K., G. Zhang, Y. W. Wang, and S. Cai. "Finite element analysis on contact stress of high-speed railway bearings." IOP Conference Series: Materials Science and Engineering 504 (April 26, 2019): 012073. http://dx.doi.org/10.1088/1757-899x/504/1/012073.

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Zirkelback, Nicole, and Luis San Andre´s. "Finite Element Analysis of Herringbone Groove Journal Bearings: A Parametric Study." Journal of Tribology 120, no. 2 (April 1, 1998): 234–40. http://dx.doi.org/10.1115/1.2834415.

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Currently, the herringbone groove journal bearing (HGJB) has important applications in miniature rotating machines such as those found in the computer information storage industry. Grooves scribed on either the rotating or stationary member of the bearing pump the lubricating fluid inward thus generating support stiffness and improving its dynamic stability when operating concentrically. The narrow groove theory (NGT), traditionally adopted to model the concentric operation of these bearings, is limited to bearings with a large number of grooves. A finite element analysis is introduced for prediction of the static and rotordynamic forced response in HGJBs with finite numbers of grooves. Results from this analysis are then compared to available experimental data as well as to estimates from the NGT. A bearing geometry parametric study is then conducted to determine optimum rotordynamic force coefficients. A discussion on the temporal variation of the bearing reaction forces and force coefficients for a rotating journal with a small number of grooves is also presented. These changes can be significant at high operating eccentricities, possibly inducing a parametric excitation in rotating systems employing this type of bearing.

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Nguyen, S. H. "p-Version Incompressible Lubrication Finite Element Analysis of Large Width Bearings." Journal of Tribology 113, no. 1 (January 1, 1991): 116–19. http://dx.doi.org/10.1115/1.2920575.

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This paper presents a p-version finite element formulation for incompressible lubrication analyses where the pressure field can be of any arbitrary polynomial of order p. The formulation ensures the C° continuity between mating element boundaries. Numerical examples are provided to demonstrate the simplicity of modeling and the accuracy of the formulation.

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Hashimoto, H. "Analysis of step journal bearings by a semianalytical finite element method." Wear 103, no. 2 (May 1985): 93–102. http://dx.doi.org/10.1016/0043-1648(85)90126-7.

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