噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2013年
3期
39-43
,共5页
振动与波%误差传递分析%浮筏隔振系统%频响函数综合%矩方法
振動與波%誤差傳遞分析%浮筏隔振繫統%頻響函數綜閤%矩方法
진동여파%오차전체분석%부벌격진계통%빈향함수종합%구방법
vibration and wave%uncertainty propagation%floating raft system%FRF-based substructuring method%moment method
采用基于频响函数综合的子结构方法对浮筏隔振系统进行建模分析和误差传递分析。针对测试频响函数的一些常见误差，如测试噪声对频响函数幅值和相位的污染，同一子结构的频响函数不满足互易性，原点频响函数的虚部小于零等，分析其在综合时由于误差传递和放大效应对综合结果的影响。并采用矩方法对误差传递进行定量分析，将矩方法的结果和采用Monte Carlo方法的结果进行对比，结果表明矩方法具有较高的效率和精度。
採用基于頻響函數綜閤的子結構方法對浮筏隔振繫統進行建模分析和誤差傳遞分析。針對測試頻響函數的一些常見誤差，如測試譟聲對頻響函數幅值和相位的汙染，同一子結構的頻響函數不滿足互易性，原點頻響函數的虛部小于零等，分析其在綜閤時由于誤差傳遞和放大效應對綜閤結果的影響。併採用矩方法對誤差傳遞進行定量分析，將矩方法的結果和採用Monte Carlo方法的結果進行對比，結果錶明矩方法具有較高的效率和精度。
채용기우빈향함수종합적자결구방법대부벌격진계통진행건모분석화오차전체분석。침대측시빈향함수적일사상견오차，여측시조성대빈향함수폭치화상위적오염，동일자결구적빈향함수불만족호역성，원점빈향함수적허부소우령등，분석기재종합시유우오차전체화방대효응대종합결과적영향。병채용구방법대오차전체진행정량분석，장구방법적결과화채용Monte Carlo방법적결과진행대비，결과표명구방법구유교고적효솔화정도。
The FRF-based substructuring method was used for vibration transmission prediction and uncertainty propa-gation analysis in a floating raft system. The effects of various commonly encountered uncertainties of substructure FRFs, such as measurement noise, reciprocity violation, negative imaginary part of the FRFs at the origin, on the modeling results were investigated. The effects of uncertainty propagation and amplification on the FRF’s result were analyzed. The uncer-tainty propagation was quantitatively analyzed using the moment method. The result was compared with that from Monte Carlo method. It shows that the moment method is of higher efficiency and accuracy.
