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| Dynamic characteristics analysis of rubber components based on an overlay model |
| LI Sijie, LUO Shihui, WANG Bo, MA Weihua |
| State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China |
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Abstract Based on the theory of an overlay model, the dynamic characteristics of rubber components were studied.A one-dimensional multi-parameter rubber constitutive model was established by using the time-step method in MATLAB.The model consists of elastic element, viscoelastic element, and elastoplastic element in parallel.The viscoelastic element uses Abel dashpot to characterize the frequency dependence of rubber components.The elastoplastic element uses a multilinear perfectly elastoplastic model to characterize the amplitude dependence of rubber components.The comparison with the test results show that: when the force of rubber spring based on overlay model was calculated with the harmonic excitation, the calculation results of the force-displacement hysteresis curves agree with the test results well, and the stiffness frequency amplitude dependence and damping frequency dependence were well characterized.When the force of the rubber isolator based on the overlay model was calculated with the random excitation, the calculation results of the model can match the test data with the high frequency excitation and has a certain degree of deviation with the low frequency excitation, but the calculation accuracy is within the acceptable range of engineering.The overlay model proposed can better characterize the dynamic characteristics of rubber components and improve the accuracy of the dynamic model.
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Received: 15 November 2018
Published: 15 April 2020
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