多因素影响下的连杆机构可靠性分析

连杆机构可靠性通常研究机构能否有效运转，以及动起来之后是否准确。综合考虑尺寸误差、装配误差、间隙、摩擦系数、载荷、速度共6种因素的影响下，基于多体动力学理论和间隙碰撞理论对典型机构进行建模，并假定上述6种影响因素为正态分布，且相互独立。然后应用Monte Carlo抽样仿真的方法对机构可靠性进行分析，进一步研究各个影响因素在不同变化范围的水平下，对机构可靠度的影响大小，从而确定主要影响因素，为后续机构可靠性研究设计提供了参考。对于其他机构的可靠性研究，也具有一定借鉴意义。

Relialbility Ananlysis for Link Mechanism Under Influence of Multiple Factors

The reliability analysis for link mechanism usually concerns the effectiveness and accuracy of the motion of the mechanism.Considering the influence of dimensional errors,clearances,assembling errors,friction coefficients,input driving velocities and external loads comprehensively,the typical mechanism model based on multi-rigid-body dynamics and clearance contact theory is established.Assuming that the above factors follow normal probability distribution are independent with each other,the mechanism reliability is analyzed by using the Monte Carlo sampling simulation method,and the effects of the above factors on the mechanism reliability are studied further.Then,the significant factors can be identified.The analysis can provide reference for the subsequent reliability analysis of the mechanism.Meanwhile,for the reliability analysis of other mechanisms,this paper makes sense for reference.