基于有限元技术的轮装制动盘螺栓应力计算  

The bolt stress analysis of wheel mounted disc based on the finite element technology

作　　者：王飞[1] 王风洲[1] 于钦顺[1] 

机构地区：[1]青岛四方车辆研究所有限公司,青岛266031

出　　处：《应用力学学报》2015年第5期884-888,904,共5页Chinese Journal of Applied Mechanics

摘　　要：高速动车组动力车基础制动基本采用轮装制动盘及夹钳单元,而螺栓是轮装制动盘最为关键的部件,准确计算出螺栓在制动过程中的最大应力是合理选择螺栓的必要条件。本文针对国内某型号250km时速城际动车组的一种EWMD680型轮装制动盘,提出了一种基于有限元技术计算螺栓在制动过程中的最大应力的方案,并分三部分论述:首先论述螺栓预紧力的计算方法;其次论述制动盘在制动过程中温度最高时刻的温度场计算方法;由于制动盘在温度最高时刻发生热膨胀,螺栓进一步受拉,与螺栓预紧力相叠加会产生最大螺栓拉应力,最后本文论述了最大螺栓拉应力的计算方法。试验结果表明,依据本文提出的计算方法而选择的螺栓经过1000次制动盘停车制动试验后,没有发生断裂或松动的现象。这表明本文方法是可行的。Wheel mounted disc and clamped unit are used in the high speed EMU power car, and the bolts are the most important components for wheel mounted disc. So the accuracy of the calculation method for the maximum stress of bolt in the braking process is a necessity to choose the reasonable bolt. In this paper, a FEM method for the maximum stress of bolt in the braking process is proposed. The method consists of three steps: firstly, a method for calculating the pre-tightening force of bolt is proposed, secondly, a method for calculating the temperature field of disc is proposed, finally, the maximum stress of bolt due to the thermal expansion of disc in the braking process is calculated. Experimental results indicate that fracture or loosening of the bolts selected according to this calculation method do not occur after 1000 times of the brake stops on the friction bench.

关 键 词：轮盘 螺栓 有限元分析 

分 类 号：U266.2[机械工程—车辆工程]