摘要
针对某商用车怠速时前照灯抖动的问题,研究了前照灯产生怠速抖动的机理。对激励源和传递路径进行了测试分析;并利用CAE仿真技术对前照灯总成模块进行固有频率及振型分析。仿真分析表明,前照灯总成模块与激励频率重叠而发生了共振。通过CAE仿真分析,提出了在前照灯与下防护之间增加支撑的优化方案。仿真结果表明,优化后的固有频率与激励频率之间的间隔在6 Hz以上,避开了激励频率,有效地解决了前照灯怠速工况下的抖动问题。实车测试验证了该方案的有效性。
For the commercial vehicle headlamp jitter problem when idling,the mechanism to generate idle jitter was studied,and the vibration source and transmission path were tested and analyzed. The natural frequency and vibration types of the headlamp assembly were analyzed using CAE simulation technology. The simulation results showed that the frequency of the headlamp assembly and the vibration source overlap resulting in resonance.After CAE analysis,an optimization scheme about adding a support between the headlamp and the lower protection was proposed. The simulation results showed that the headlamp ＇s natural frequency was far from the vibration source frequency,it was 6 Hz between them. So it solved the headlamp idling jitter problem effectively. The substantial vehicle tests verified the effectiveness of the optimization scheme.
出处
《科学技术与工程》
北大核心
2016年第32期296-301,共6页
Science Technology and Engineering
基金
国家自然科学基金(11502056)
广西高校科研项目(201202ZD070)
广西汽车零部件与整车技术重点实验室自主研究课题(14-A-03-01)
广西汽车零部件与整车技术重点实验室开放课题(2012KFMS03
2013KFZD02)
广西科技大学研究生教育创新计划项目(GKYC201618)资助
关键词
商用车
前照灯
怠速抖动
优化
commercial vehicle
headlamp
idling jitter
optimization
