摘要
建立了某轻型卡车的驾驶室白车身有限元模型,并对其进行了数值模态与试验模态的计算和分析。基于模态匹配原则对驾驶室进行动态特性分析,并对该卡车驾驶室进行基于模态一阶频率灵敏度分析的驾驶室结构优化,降低了驾驶室的一阶扭转频率,增大了其与发动机怠速激励频率的差值,一定程度上达到了减振降噪的目的。
White body finite element model of a light-truck cab is established,with which numerical and experimental modal calculations and analysis are conducted.Based on modal matching principle,a dynamic characteristics analysis is performed.Furthermore,the cab structure optimization is carried out based on the modal first frequency sensitivity analysis.By the structure optimization,the first torsion frequency of the cab is reduced.Meanwhile,the difference between the first torsion frequency and the excitation frequency with the engine idling is increased.To some extent the purpose of reducing vibration and noise is achieved.
出处
《井冈山大学学报（自然科学版）》
2013年第1期87-91,共5页
Journal of Jinggangshan University (Natural Science)
关键词
驾驶室
模态
灵敏度
有限元
优化
cab
modal
sensitivity
finite element
optimization
