采煤机摇臂传动系统可靠性稳健优化设计

采煤机摇臂传动系统为采煤机的关键动力传递部件。以MG300/700-WD型采煤机摇臂传动系统为研究对象，根据实际工况建立了系统的有限元模型，利用Matlab软件对传动系统进行了非线性动力学特性分析，得到了系统危险部位的应力谱。在此基础上对摇臂传动系统进行了疲劳分析，建立了摇臂传动系统疲劳寿命可靠性模型。依据可靠性理论，采用四阶矩法对摇臂传动系统进行可靠性及可靠性灵敏度分析，分析了系统结构参数对系统可靠性的影响程度。对于摇臂传动系统疲劳寿命敏感的结构参数，进行了可靠性稳健优化设计，与单目标优化方法进行对比，并针对优化结果使用蒙特卡洛模拟的方法对可靠性进行了验证。结果表明，对采煤机摇臂传动系统进行可靠性稳健优化设计是一种实用、有效的方法。

Reliability-based robust optimization design of the transmission system of a shearer ranging arm

The transmission system of a shearer ranging arm is a key dynamic transmission component of the whole machine.Taking a ranging arm transmission system of the MG300/700-WD type shearer as a research target,a finite element analysis model of the transmission system was built according to the actual working conditions.Using the nonlinear dynamic analysis in Matlab software,the stresses of the weak parts of the transmission system at different times were obtained.Then the fatigue life reliability model was established with the fatigue damage analysis of the transmission system.Based on the reliability model and theory,the influences of design variables on the reliability of the system were analyzed by the reliability and reliability sensitivity analysis of the system using the forth moment method.Finally,the reliability-based robust optimization design of the sensitive design variables was achieved,and the results were verified by Monte Carlo method and compared with that of single objective optimization method.The results show that the reliability-based robust optimization design of the transmission system of a shearer ranging arm is practical and effective.