CAJ | 학술논문

文章针对某轻型载货车车架就测点布置、激励方式、试验频段和激振点的选择等方面,给出了模态试验的具体方法,通过模态数据的采集、处理和分析,得到了车架的频响函数稳态图、十阶自由模态的固有频率及振型,并对结果进行了分析;通过对模态试验分析与有限元动力特性分析结果的比较,发现两者具有高度的一致性,该轻型载货车车架结构设计合理,表明了有限元动力特性分析方法可以直接评价结构设计,预估在一定使用环境下车架结构可能出现的问题,是一种有效的分析方法.
문장침대모경형재화차차가취측점포치、격려방식、시험빈단화격진점적선택등방면,급출료모태시험적구체방법,통과모태수거적채집、처리화분석,득도료차가적빈향함수은태도、십계자유모태적고유빈솔급진형,병대결과진행료분석;통과대모태시험분석여유한원동력특성분석결과적비교,발현량자구유고도적일치성,해경형재화차차가결구설계합리,표명료유한원동력특성분석방법가이직접평개결구설계,예고재일정사용배경하차가결구가능출현적문제,시일충유효적분석방법.
This paper gives a specific method of modal test concerning shock excitation method, fixed mode,stimulating method,choice of experimental frequency band and arrangement of measuring point, experimental theory and measurement to guarantee measures in precision. It gets the frequency response function stable chart, ten modal frequencies and modes of frame and the results are analysed. At the same time, the results between modal test and FEA dynamic characteristics are analysed and compared. It is found out that the two methods are in high consistency. It not only indicates the truck frame construction designs are reasonable, but also can be used for evaluating structural design directly. And it can be predicted some prossible problems may appear under certain usage conditions. Therefore it is an effective analytical method.