采煤机摇臂壳体瞬态动力学与模态分析

Transient dynamics and modal analysis of rocker shell of shearer

为研究瞬时负载作用下采煤机行走过程中摇臂壳体的力学特性,结合某型号采煤机实际工况,对采煤机摇臂壳体进行了瞬态动力学与模态分析,结果表明:摇臂壳体上齿轮传动箱与电动机仓相交处和行星头部与齿轮传动箱相交处应力较大,均超过摇臂壳体材料的屈服极限,为摇臂壳体薄弱部位;前6阶模态振型中振幅最大部位均集中在行星头部。该分析结果可为摇臂壳体的优化设计提供理论依据。

In order to study mechanical characteristics of rocker shell in shearer walking process under instantaneous load, transient dynamics and modal analysis of rocker shell of shearer were carried out incombination with actual working condition of a certain type shearer. The results show that stress atintersection of gear transmission box and motor box, and intersection of planetary head and geartransmission box on the rocker shell is larger, which exceeds yield limit of rocketwo intersections are weak parts of the rocker shell. In the first 6-order modal shape, the maximumamplitude occurs at the planetary head. The analysis results can provide theoretical basis for optimaldesign of the rocker shell.