砂轮破裂后磨床工作机构动态过程的仿真分析

A Simulation Analysis for Dynamics Processes of High Efficiency Grinder Workgroup with Broken Grinding\|Wheel

提出了一种用于砂轮破裂后高效磨床动态过程分析的仿真方法。采用显式时间积分格式，磨床安全防护罩采用法向方向５ 点积分的ＨｕｇｈｅｓＬｉｕ 壳单元，等向强化弹塑性材料模型。砂轮、法兰、主轴及支座则采用一点积分的８ 节点实体单元。利用快速可靠的接触搜寻法及零能模式控制技术，可以准确地模拟砂轮破裂后高效磨床的动态过程，利用间接方法验证了该方法的可靠性。

A simulation method that is used to simulate the dynamics processes of high efficiency grinder workgroup with broken grinding\|wheel is presented. The explicit time integration formulation is used. The Hughes\|Liu shell element with five through\|the\|thickness integration points is empolyed in the model of safety\|cover of grinder. The material is assumed to satisfy the elastic\|plastic yield condition with isotropic hardening. The 8\|mode solid element with a one\|point integration is used for the model of grinding\|wheel,flange,spindle and bearing. Dynamic processes of grinder with broken grinding\|wheel can be simulated accurately by using effective contact searching algorithm and the numerical control procedures of the hourglass instability. The validity of this method is verified by an indirect test. A numerical example using this method is given.