Wu Jida, Liu Chusheng, Jiang Haishen, Wang Zhenqian
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China.
School of Chemical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China.
Sci Prog. 2020 Jul-Sep;103(3):36850420956985. doi: 10.1177/0036850420956985.
In order to analyze the stiffness characteristics of Assembled Rubber Metal Isolator (ARMI) more accurately, the present work elaborates on the detailed numerical modeling and analysis process of the ARMI, considering prestressing condition. By comparing the applicability of different constitutive models, the reasonable parameters of the proposed Money-Revlon constitutive model were determined by rubber compression test and least square method. Considering the structural characteristics and complex constraints of the isolator, a step-by-step analysis method is described, based on the rigid-flexible coupling theory and the contact cutting algorithm. The full Newton-Raphson algorithm is used to simulate the mechanical behavior of elastic components in ARMI, during the whole compression-torsion deformation process, while the results are verified by theoretical calculation and practical experiments, respectively. For the assembly process, the maximum relative error between numerical results and empirical formulas is 3.97%. The derived torsional curve, under the simulated pre-stress conditions, is in good agreement with the experimental results, and the maximum error is less than 8.43%. The achieved accuracy is significantly improved, compared to the existing simulation model that does not consider the pre-compression process. The proposed approach provides an effective method for the analysis of same type vibration isolator.
为了更准确地分析装配式橡胶金属隔振器（ARMI）的刚度特性，本文考虑预应力条件，详细阐述了ARMI的数值建模和分析过程。通过比较不同本构模型的适用性，利用橡胶压缩试验和最小二乘法确定了所提出的Money-Revlon本构模型的合理参数。考虑到隔振器的结构特点和复杂约束，基于刚柔耦合理论和接触切割算法，描述了一种逐步分析方法。在整个压缩-扭转变形过程中，采用完全牛顿-拉夫逊算法模拟ARMI中弹性部件的力学行为，结果分别通过理论计算和实际试验进行验证。对于装配过程，数值结果与经验公式之间的最大相对误差为3.97%。在模拟预应力条件下得到的扭转曲线与试验结果吻合良好，最大误差小于8.43%。与不考虑预压缩过程的现有仿真模型相比，所达到的精度有显著提高。所提出的方法为同类隔振器的分析提供了一种有效方法。
