摘要
基于Stewart平台原理,建立了商用车保险杠总成疲劳仿真系统平台。以某试车场的道路载荷谱为目标信号进行了虚拟载荷迭代,获得了保险杠总成在实际耐久路面的疲劳载荷,进而对其进行了疲劳寿命预测。通过对比关键点的应变信号,在时域、频域及雨流域上达到较好对比结果,表明基于Stewart平台的疲劳仿真方法具有较高的精度,能够为包括保险杠在内的商用车零部件系统进行疲劳寿命预测,在控制其耐久性能的同时大幅节约研发时间。
Fatigue simulation system platform of commercial vehicle bumper assembly was built based on the theory of Stewart platform.Virtual load iteration was performed by adapting road load spectrum of proving ground as the target signal to obtain the fatigue load of bumper assembly on real durable road,thus to predict its fatigue life.By comparing strain signals of the key point,good comparative results were obtained in the time domain,frequency domain and rainflow domain,indicating that the fatigue simulation method based on Stewart platform had high precision.Therefore the commercial vehicle components including bumper system can be predicted for its fatigue life so as to control the durability performance and shorten development cycle significantly.
引文
(一)本书仅收录摘要,全文刊载在《汽车技术》(2016年第09期)。