为实现采煤机螺旋滚筒在复杂煤层赋存条件下综合性能最优,以“MG400/951-WD”型号采煤机为研究对象,基于破煤理论,利用Matlab得到了含坚硬夹矸及(或)硫化铁结核的复杂煤层赋存条件下螺旋滚筒截齿载荷,结合刚柔耦合虚拟样机技术建立以螺旋滚筒为柔性件的采煤机刚柔耦合虚拟样机模型,仿真发现了采煤机薄弱环节;结合EDEM离散元技术得到采煤机装煤性能。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,分析了螺旋滚筒设计变量对渐变可靠性灵敏度的影响,构建了螺旋滚筒多目标优化设计评价函数,利用改进粒子群算法,得到设计变量最优解。结果表明,优化后的螺旋滚筒最大应力下降,装煤率提高,螺旋滚筒综合性能得到提升,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,为采掘机械设备的可靠性分析与设计提供理论方法和数据支撑,具有普适性。

In order to realize shearer’ s drum optimal comprehensive performance in complicated seam, using the MG400 / 951-WD shearer model as the research object,baseing on the cutting coal theory,drum’ s three to the force and torque load was obtained by Matlab. Combing with rigid-flexible virtual prototype coupling established a virtual prototype model with flexible drum,weak links were found through the simulation;Combing with EDEM found the loading performance. Combing with the theory of reliability sensitivity design,robust design theory and the theory of performance degradation,analyzed the influence of the drum’s design variables to reliability sensitivity gradient,estab- lished a multi-objective optimization evaluation function of drum,the optimal design variables was obtained by im- proved particle swarm optimization. The results show that the optimized drum maximum stress declined,coal rate,com- prehensive performance and reliability was improved. combing with the theory of reliability sensitivity design,robust design theory and the theory of performance degradation,provides an important support of the theory and method of da- ta for mining machinery,it is universal.