基于有限元近似模型的破碎机动颚结构优化设计  

Structural optimization design of moving jaw of crusher based on finite element approximate model

作　　者：杨春兰[1] 程发龙 黄大明[1] 

机构地区：[1]广西大学机械工程学院,广西南宁530004

出　　处：《矿山机械》2016年第6期36-39,共4页Mining & Processing Equipment

基　　金：广西制造系统与制造技术重点实验室项目(10-046-07S02);广西大学科研基金资助项目(XJZ120276)

摘　　要：针对传统复摆颚式破碎机产品中存在的机件结构设计不合理、质量偏大、耗材偏多、成本偏高等问题,选择动颚作为优化设计的对象,在建立动颚参数化有限元分析模型的基础上,将近似模型技术引入优化设计中,采用拉丁超立方设计方法建立动颚结构近似模型,继而以动颚的轻量化为目标,以结构尺寸为设计变量,在ISIGHT平台对动颚结构进行优化,得出在满足强度、刚度前提下最小动颚体质量。结果表明,经过优化的动颚质量比原结构减少近1/4,不仅节省材料,降低成本,而且在一定程度上改善了机构的动力学性能,降低了机器的振动和零件的磨损,提高了产品的使用寿命。近似模型误差分析表明,所建立的近似模型精度良好,可代替高精度的有限元仿真模型进行优化设计,为破碎机的优化设计提供了一种高效可行的方法。In view of the problems of traditional jaw crusher including unreasonable structure of components, big mass, large material consumption and high cost, the moving jaw was taken as the structurally optimized object. After the parametric finite element model of the moving jaw being established, the approximate model technology was introduced into the optimization design. Latin hypercube design method was applied to build the approximate model of the moving jaw, and then the lightweight moving jaw was taken as the object and the structural dimensions as the design variables, the moving jaw was structurally optimized by using ISIGHT, thus the lightest moving jaw was achieved on the premise of the strength and the stiffness being guaranteed. The results showed： the optimized moving jaw reduced by 1/4 in the mass compared with the original one, the material cost not only was reduced, but the dynamic performance of the mechanism was improved to some degree; the vibration of the crusher and the abrasion of parts relieved, the lifespan of the crusher enhanced. The error analysis of the approximate model indicated the established approximate model was excellent in precision, which could replace the high-precision finite element model to complete optimization design. The method offered an effective and feasible reference for the optimization design of the crusher.

关 键 词：颚式破碎机 动颚 有限元近似模型 结构轻量化 ISIGHT 

分 类 号：TD451[矿业工程—矿山机电]