摘要
阐述了油底壳、油液耦合系统模态分析建模方法,对油底壳的结构模态和耦合模态进行了计算,并通过模态试验对模态结果进行了验证。测试结果表明,无论是结构模态还是耦合模态,其测试结果与计算结果都具有很好的一致性。进一步研究发现,油液不会对油底壳模态振型产生大的影响,但会使油底壳的模态频率明显下降;油液质量是导致油底壳模态频率下降的主要原因,而油液的体积模量对油底壳模态频率影响很小。
The structure model and fluid-structure interaction （FSI） model of an oil pan are built respectively, and thebuilding procedure of FSI model is introduced in detail. Both models are verified by comparing modal results of simulationwith those of modal testing. Their modal shapes and eigenvalues are discussed carefully. The results show that engine oil hasless influence on modal shape of the oil pan, but can reduce the modal frequency of the oil pan obviously. Mass of the engineoil is the main factor to reduce the modal frequency, while bulk modulus of the engine oil has little impact on the modalfrequency.
出处
《噪声与振动控制》
CSCD
2014年第6期17-19,24,共4页
Noise and Vibration Control
关键词
振动与波
流固耦合
油底壳
模态试验
耦合模态
vibration and wave
fluid-structre interaction（FSI）
oil pan
modal testing
coupled mode
