In this study, a numerical investigation on the dynamic characteristics of a reciprocating mechanism with clearance considering parameter uncertainty is presented. For this purpose, complex space motion between parts is converted into simplified motion of basic component based on the proposed mass substitution model. The contact model in motion parts is established using the Lankarani–Nikravesh model, and the friction effect is considering using a modified Coulomb friction model in the proposed methodology. The comparisons between the numerical results, experimental ones, and virtual simulation ones are carried out. The results show that the proposed methodology has a higher efficiency and calculated precision to predict the dynamic behavior of a reciprocating mechanical system with clearance. In addition, the effects of interval clearance and initial force in the gas-operated chamber on the dynamic behavior are analyzed, respectively. Also, the interaction of two factors is discussed to improve the motion stability.

中文翻译：

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考虑参数不确定性的带间隙往复机构动力学行为分析

在这项研究中，对考虑参数不确定性的带间隙往复机构的动态特性进行了数值研究。为此，基于所提出的质量替代模型，零件之间的复杂空间运动被转换为基本组件的简化运动。运动部件中的接触模型使用Lankarani-Nikravesh 模型建立，并且摩擦效应在所提出的方法中使用改进的库仑摩擦模型进行考虑。对数值结果、实验结果和虚拟模拟结果进行了比较。结果表明，所提出的方法具有更高的效率和计算精度，可以预测具有间隙的往复机械系统的动态行为。此外，分别分析了气室间隙间隙和初始力对动力学行为的影响。此外，还讨论了两个因素的相互作用以提高运动稳定性。