2023年8月强度与环境Aug.2023第50卷第4期STRUCTURE&ENVIRONMENTENGINEERINGVol.50No.4收稿日期:2023-03-11;修回日期:2023-05-27作者简介:何志勇(1978-),男,硕士,高工,(710100)西安市长安区飞天路289号.基于B样条加权三重叠加的随机振动信号生成技术研究何志勇王婷庞勇王珺李斌潮(西安航天动力研究所,陕西西安710100)摘要:随机振动试验是评估工程结构在高斯振动载荷力学环境下的安全性和可靠性的一种模拟试验,而随机振动控制功率谱密度生成时域高斯随机振动驱动信号是随机振动试验关键技术之一,常用的生成高斯驱动信号方法主要是伪随机法、正弦窗叠加法等。本文提出了基于B样条加权三重叠加的随机振动信号生成方法,并与常用正弦窗叠加法进行了对比,结果表明:基于B样条加权三重叠加的随机振动信号生成方法提高振动模拟试验的真实性和控制幅值动态范围精度,而这两种方法生成时域随机信号的偏斜度、峭度值相当,都满足高斯分布性能要求,验证了该新方法的正确性和有效性。关键词:B样条加权;三重叠加;相位配方;正弦窗叠加法;高斯驱动信号中图分类号:TB33文献标识码:A文章编号:1006-3919(2023)04-0059-06DOI:10.19447/j.cnki.11-1773/v.2023.04.010TheResearchonRandomVibrationSignalGenerationBasedonB-SplineWeightedTripleOverlapHEZhiyongWANGTingPANGYongWANGJunLIBinchao(Xi’anAerospacePropulsionInstitute,Xi’an710100,China)Abstract:therandomvibrationtestisakindofsimulationtesttoevaluatethesafetyandreliabilityofengineeringstructuresunderGaussianvibrationload,anditisoneofthekeytechnologiesofrandomvibrationtestthattherandomvibrationcontrolpowerdensityspectrumgeneratesthetime-domainGaussianrandomvibrationdrivesignal.ThecommonlyusedmethodsforgeneratingGaussiandrivingsignalsarepseudo-randommethodandsinewindowsuperpositionmethodetc.Inthispaper,arandomvibrationsignalgenerationmethodbasedonweightedtriplesuperpositionofB-splineisproposed,andthetheoreticalanalysisanddatasimulationarecarriedoutwiththecommonSinewindowsuperpositionmethod.TheresultsshowthattherandomvibrationsignalgenerationmethodbasedonB-splineweightedtripleoverlapimprovestheauthenticityofvibrationsimulationtestandtheaccuracyofdynamicrangeofcontrolamplitude,Theskewnessandkurtos...