CAJ | 학술논문

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。
천술료유저각、유액우합계통모태분석건모방법，대유저각적결구모태화우합모태진행료계산，병통과모태시험대모태결과진행료험증。측시결과표명，무론시결구모태환시우합모태，기측시결과여계산결과도구유흔호적일치성。진일보연구발현，유액불회대유저각모태진형산생대적영향，단회사유저각적모태빈솔명현하강；유액질량시도치유저각모태빈솔하강적주요원인，이유액적체적모량대유저각모태빈솔영향흔소。
The structure model and fluid-structure interaction (FSI) model of an oil pan are built respectively, and the building procedure of FSI model is introduced in detail. Both models are verified by comparing modal results of simulation with those of modal testing. Their modal shapes and eigenvalues are discussed carefully. The results show that engine oil has less influence on modal shape of the oil pan, but can reduce the modal frequency of the oil pan obviously. Mass of the engine oil is the main factor to reduce the modal frequency, while bulk modulus of the engine oil has little impact on the modal frequency.