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以蒙特卡罗法为理论核心,利用多体运动学和动力学分析软件——LMS Virtual.Lab作为运动机构可靠性分析平台,通过Visual Basic.NET程序设计语言建立用户界面并实现对LMS Virtual.Lab的调用,以进行运动机构的可靠性仿真试验,采用得到的随机变量数据库和结果数据库对运动机构进行典型失效模式的可靠性分析,从而形成了一套可以实现运动机构的可靠性仿真与分析功能的可靠性仿真试验系统。以对心曲柄滑块机构为例,进行了几何尺寸误差和运动副间隙误差影响下的机构运动精度可靠性分析;以某锁机构为例,研究多失效模式下动力学特性对于机构定位可靠性的影响并进行了灵敏性分析。通过这两个实例验证该可靠性仿真试验系统进行机构可靠性仿真试验和可靠性分析的可行性和有效性。
Taking Monte Carlo method as the theoretical core, LMS Virtual.Lab is used as the reliability analysis platform of the kinematic mechanism by using multi-body kinematics and dynamics analysis software, and the user interface is established by Visual Basic.NET programming language and implemented on LMS Virtual. Lab to carry out the reliability simulation test of the moving mechanism. The reliability analysis of the typical failure mode of the moving mechanism is carried out by using the obtained random variable database and the result database, so that a set of simulation and analysis to achieve the reliability of the moving mechanism can be formed Functional reliability simulation test system. Taking the heart crank slider as an example, the reliability analysis of motion accuracy under the influence of geometrical dimension error and clearance error was carried out. Taking a lock mechanism as an example, the dynamic characteristics of multi-failure mode The impact and sensitivity analysis. The feasibility and effectiveness of the reliability simulation test system for mechanism reliability simulation and reliability analysis are verified by these two examples.