SHIPENGINEERING船舶工程Vol.45No.22023总第45卷,2023年第2期—39—隔振系统基于折减矩形脉冲的DDAM时域等效算法张博,孙海滨,王强,李佳,朱钰(上海船舶设备研究所,上海200031)摘要:与逐步积分法等时域响应计算方法相比,动态设计分析方法(DDAM)在很多船舶设备的冲击响应计算中有一定局限性。为了将DDAM冲击谱转化为时域冲击输入,对时域算法展开研究,分析DDAM的时域等效条件以及参数的影响,总结计算方法,并通过隔振系统冲击算例验证时域等效DDAM的可行性。研究表明,基于折减矩形波脉冲的时域算法能够等效替代DDAM,并克服了DDAM无法解决隔振器限位等非线性冲击计算问题。关键词:隔振系统;折减矩形脉冲;动态设计分析方法(DDAM);时域等效算法中图分类号:U671.99文献标志码:A【DOI】10.13788/j.cnki.cbgc.2023.02.05Time-DomainEquivalenceAlgorithmofDDAMofVibrationIsolationSystemBasedonReducedRectangularPulseZHANGBo,SUNHaibin,WANGQiang,LIJia,ZHUYu(ShanghaiMarineEquipmentResearchInstitute,Shanghai200031,China)Abstract:Comparedtotime-domainalgorithmssuchasstep-by-stepintegration,dynamicdesignandanalysismethod(DDAM)confrontssomelimitationswhenemployedinassessinganti-shockperformanceofmanynavalequipment.InordertotransferDDAMspectrumintotheformoftimepulse,time-domainequivalentmethodisparametricallystudied.ThetimedomainequivalentconditionsofDDAMandtheinfluenceofparametersareanalyzed,andthecalculationmethodissummarized.ThefeasibilityoftimedomainequivalentDDAMisverifiedthroughanimpactcalculationexampleofavibrationisolationsystem.Researchshowsthatthereduced-square-pulseisabelievablewayinnonlinearcasessuchasunstablebehaviorcausedbyisolators’restrictingcharacteristics,whereDDAMisinapplicable.Keywords:vibrationisolationsystem;reducedrectangularpulse;dynamicdesignandanalysismethod(DDAM);timedomainequivalencealgorithm0引言抗冲击性能是船舶生命力和作战能力的重要组成部分[1]。水下非接触爆炸(Under-WaterExplosion,UNDEX)对船舶抗冲击性能构成严峻考验,可在不破坏船体外壳的情况下直接损伤内部设备,使其功能失效。船用隔振装置不仅具有减振降噪功能,对船载机电设备还具有冲击防护作用,可降低设备自身的抗冲击设计需求,但其较大的弹性运动...