装备环境工程
裝備環境工程
장비배경공정
EQUIPMENT ENVIRONMENTAL ENGINEERING
2013年
2期
52-55
,共4页
随机振动试验%动力学特性%夹具%推力估算
隨機振動試驗%動力學特性%夾具%推力估算
수궤진동시험%동역학특성%협구%추력고산
random vibration test%dynamic characteristics%fixture%force estimation
分析了随机振动试验中试件和夹具的一阶频率对振动台推力的影响,提出了一种考虑试件、夹具一阶频率的随机振动试验推力估算方法.就一个算例用仿真计算的方法,得到了振动台推力随试件和夹具一阶频率的变化情况.最后通过一个应用实例,验证了该方法的准确性.该方法比传统的刚性假设方法更接近实际,可为大型试件随机振动试验设计提供参考.
分析瞭隨機振動試驗中試件和夾具的一階頻率對振動檯推力的影響,提齣瞭一種攷慮試件、夾具一階頻率的隨機振動試驗推力估算方法.就一箇算例用倣真計算的方法,得到瞭振動檯推力隨試件和夾具一階頻率的變化情況.最後通過一箇應用實例,驗證瞭該方法的準確性.該方法比傳統的剛性假設方法更接近實際,可為大型試件隨機振動試驗設計提供參攷.
분석료수궤진동시험중시건화협구적일계빈솔대진동태추력적영향,제출료일충고필시건、협구일계빈솔적수궤진동시험추력고산방법.취일개산례용방진계산적방법,득도료진동태추력수시건화협구일계빈솔적변화정황.최후통과일개응용실례,험증료해방법적준학성.해방법비전통적강성가설방법경접근실제,가위대형시건수궤진동시험설계제공삼고.
@@@@The influence of first order frequency of test specimen and fixture on the force of shaking table was analyzed. A method considering first order frequency of test specimen and fixture was put forward in order to estimate the force of shaking table during a random vibration test. The relationship between the force of shaking table and the first order frequencies of test specimen and fixture was obtained through simulation method. The accuracy of the method was proved by an application example. Compared with the traditional rigid assumptions method, this method is more close to the actual, and it can be reference of vibration test design for large-scale specimen.