摘要
为提高采煤机截割部行星架在复杂煤层赋存条件下的工作可靠性,以"MG400/951-WD"型号采煤机为研究对象,基于破煤理论,利用Matlab得到含坚硬夹矸的复杂煤层赋存条件下采煤机螺旋滚筒的冲击载荷,结合刚柔耦合虚拟样机技术建立以截割部行星架为柔性件的采煤机刚柔耦合虚拟样机模型,仿真发现了行星架应力集中区域。基于可靠性灵敏度设计理论、可靠性稳健设计理论和性能退化理论,分析行星架设计变量对渐变可靠性灵敏度的影响,构建行星架多目标优化设计状态函数,利用改进粒子群算法,得到设计变量最优解。结果表明,优化后的行星架最大应力下降56.388%,设计变量灵敏度趋于零,行星架关注区域更加稳健,行星架可靠性得到提高。将刚柔耦合虚拟样机技术与可靠性灵敏度设计理论、可靠性稳健设计理论、性能退化理论和改进粒子群算法相结合,提出一种协同刚柔耦合虚拟样机动态可靠性设计方法,对机械设备传动机构的可靠性分析与设计具有重要工程应用价值。
In order to improve the reliability of shearer's planet carrie in complicated seam, using the MG400/951-WD shearer model as the research object, baseing on the cutting coal theory, drum's general force and torque load is obtained by Matlab. Combing with rigid-flexible virtual prototype coupling established a virtual prototype model with flexible planet carrie, weak links are found through the simulation. Combing with the theory of reliability sensitivity design, robust design theory and the theory of performance degradation, the influence of the planet carrie's design variables to reliability sensitivity gradient is analyzed, a multi-objective optimization evaluation function of planet carrie is established, the optimal design variables is obtained by improved particle swarm optimization. The results show that the maximum stress decreased by 56.388% and design variable sensitivity tends to be stable.Combing with the theory of reliability sensitivity design, robust design theory and the theory of performance degradation, a theory of collaborative coupled virtual prototype technology with reliability design is proposed, which has important engineering application values.
作者
赵丽娟
范佳艺
李明昊
李惠
ZHAO Lijuan;FAN Jiayi;LI Minghao;LI Hui(College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2019年第8期192-200,共9页
Journal of Mechanical Engineering
基金
国家自然科学基金资助项目(51674134)
关键词
采煤机
行星架
刚柔耦合
可靠性灵敏度
可靠性稳健设计
shearer
planet carrier
rigid-flexible coupling
reliability sensitivity
reliability robust design
