关键词：
喷雾机底盘;有限元;载荷谱;可靠性;损伤
摘 要：
对高地隙喷杆喷雾机底盘结构可靠性进行了有限元仿真和实测试验,计算了底盘结构薄弱部位的积累损伤。基于ANSYS有限元软件分析底盘结构的应力分布并确定结构薄弱部位。对喷雾机底盘进行载荷谱实测试验,绘制了结构测试部位在典型使用工况下的载荷-时间历程。利用有限元软件计算结果,建立测试部位和薄弱部位载荷之间的关系方程。结合实测数据得到底盘薄弱部位的载荷-时间历程,采用雨流法进行数据统计处理,基于Miner线性损伤法则计算各个典型工况下底盘薄弱部位的积累损伤,根据喷雾机工作实际使用情况对典型工况下的损伤加权平均,得到底盘结构的实际使用寿命。
译 名：
Reliability Experiment on High Clearance Boom Sprayer Chassis
作 者：
Yang Fangfei;Han Xiaojin;Duan Yaoqi;Tian Yongwei;Yan Chuliang;Beijing Aircraft Strength Institute;
关键词：
Boom sprayer chassis Finite element Load spectrum Reliability Damage
摘 要：
The reliability of high clearance boom sprayer chassis was studied by simulation and experiment.The stress distribution and the weak positions of the chassis were simulated by software ANSYS.According to the finite element results,the relation equations between the load of testing points and weak positions were obtained.The load spectrum measurement experiments of spray machine chassis were carried out under typical using conditions.In data statistics processing,the rain-flow method was adopted.By means of the Miner's rule,the cumulative damages of weak positions of the chassis under various typical conditions were calculated.According to the actual use of the spray machine,the real life of the chassis was calculated by a weighted average of the damage under various typical conditions.The research method and the analysis results can provide guidance for reliability design of agricultural machinery.
