堆料装置动力学仿真优化及有限元分析

摘要

The stacker mechanism is the mechanism for stacking material in the stockyard, the main parts of the mechanism are the heavy type complex structure. Moving in the large space, the dynamic stability of the stacker mechanism is very important to its safe operation. If the luffing hydraulic cylinder load of stacker mechanism is bigger or the strength and stiffness of the main parts are insufficiency, it will cause the structure break and insecurity of stacker mechanism. In order to improve dynamic stability of the stacker mechanism, a parameterization model for stacker mechanism was established by using ADAMS, and the two articulated fulcrums initial position was achieved after reasonable optimization design. The results show that the maximal driving force of the optimized hydraulic cylinder was reduced. Meanwhile, the stress-strain of the main structure under different working conditions was checked with ANSYS by using the calculational result in the ADAMS as the loading condition. The weak parts are improved baesd on the analysis result, the optimized dynamic stability of stacker mechanism has been ensured and enhanced.%堆料装置是应用于散料料场堆积料堆的工作机构,工作时在空间大范围内运动,堆料装置的动态稳定性影响安全运行.若堆料装置俯仰油缸推力过大或者主体部件的刚度和强度不足,都可能会引起结构的早期断裂等一系列影响堆料装置安全.为了提高堆料装置的动态稳定性和主体部件强度,建立了堆料装置的参数化模型,利用多体系统动力学仿真软件ADAMS中动力学仿真与参数化优化分析的功能,对俯仰油缸两铰点位置的布置进行合理的仿真优化,结果表明优化后俯仰油缸推力大幅减小,结构布置更加合理,并求得相关铰接点的受力信息.利用ADAMS中的计算结果作为载荷条件,在ANSYS中对堆料装置主体结构件进行J多工位的有限元分析,并对其中强度薄弱的部位进行了设计调整,进一步保证和提高了优化后堆料装置的动态稳定性.