发动机缸体固有频率对加强筋厚度的灵敏度分析  

Analysis of Sensitivity of Natural Frequency to the Rib Thickness of Engine Cylinder Block

作　　者：邓晓龙[1] 许敏 陈剑[2] 顾镭 杨万里 

机构地区：[1]奇瑞汽车有限公司博士后工作站,芜湖241009 [2]合肥工业大学机械工程博士后流动站

出　　处：《内燃机工程》2007年第2期68-71,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家863项目(2005AA501310)

摘　　要：探讨了适于复杂结构固有频率的灵敏度分析的方法。针对某1．3 L铝合金发动机,分析了发动机缸体的固有频率对筋厚度的灵敏度,得到了对结构的固有频率正影响比较大的加强筋,在其附近区域采取相应的结构和参数修改,提高了缸体的固有频率。分析结果表明,灵敏度分析为发动机缸体动力学修改提供了依据,是发动机NVH性能提升的有效途径。The sensitivity analysis method for complex structure was discussed in this paper. Aimed at a 1.3 L aluminum alloy gasoline engine, the sensitivity of natural frequency to the rib thickness of cylinder block was analyzed. It is found that the ribs can enhance the natural frequency of structure effectively. Through structural and parametric modification near the effective ribs, the natural frequency was improved. The results indicate that as the basic dynamic modification method of cylinder block, the sensitivity analysis isan effective approach to improve the NVH performance of engines.

关 键 词：内燃机 缸体 灵敏度分析 固有频率 动力学修改 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]