SUMMARYAiming at 3SPS+1PS parallel hip joint simulator, the maximum stress of branched chains under the suggested trajectory is obtained by elastodynamic analysis. Based on Corten-Dolan fatigue damage theory and Rain-flow counting method, the dynamic stress of each branched chain is statistically analyzed. The fatigue life prediction shows that branched-chain A2P2C2 is the weakest component for the simulator. Finally, the fatigue reliability is analyzed and the fatigue life and reliability under different structural parameters are discussed. The study shows that the fatigue life of each branched chain can be increased or balanced by increasing structural parameters or exchanging initial motion parameters.

中文翻译：

---

平行髋关节模拟器的疲劳寿命和可靠性分析

摘要针对3SPS+1PS平行髋关节模拟器，通过弹性动力学分析得到建议轨迹下支链的最大应力。基于Corten-Dolan疲劳损伤理论和雨流计数法，对各支链的动应力进行统计分析。疲劳寿命预测表明，支链一种2磷2C2是模拟器最弱的组件。最后对疲劳可靠性进行了分析，讨论了不同结构参数下的疲劳寿命和可靠性。研究表明，可以通过增加结构参数或交换初始运动参数来增加或平衡每个支链的疲劳寿命。