航天医学与医学工程

密封性能直接关系到航天设备的安全性、可靠性和任务成功率，橡胶密封圈的密封性能与压缩操作力的优化设计直接影响设备的性能与工作效率。基于非线性材料的超弹性Mooney-Rivlin模型模拟橡胶的力学特性，建立橡胶密封圈的有限元模型。通过仿真分析，研究对比不同截面尺寸及压缩量对橡胶密封圈密封性能的影响，评估接触应力分布、最大接触应力及压缩力等关键参数。结果表明，截面形状对密封性能有显著影响，壁面厚度的增加和压缩量的增加均会引起接触应力和压缩力的增加，圆角大小影响最终的变形及接触状态。通过优化几何参数，可以在保证密封性能的同时降低压缩力，为橡胶密封圈的优化设计提供理论依据。

The sealing performance is directly related to the safety, reliability and mission success rate of aerospace equipment. The sealing performance of rubber seals and the optimized design of the compression force directly affect the performance and work efficiency of the equipment. Based on the hyperelastic Mooney-Rivlin model of nonlinear materials, the mechanical properties of rubber are simulated, and a finite element model of rubber seals is established.Through simulation analysis, the effects of different cross-section dimensions and compression amounts on the sealing performance are studied and compared, and key parameters such as the contact stress distribution, maximum contact stress, and compression force. The size of the fillet affects the final deformation and the contact state. By optimizing the geometric parameters, the compression force can be reduced while ensuring the sealing performance, providing a theoretical basis for the optimized design of rubber seals.