随机振动载荷峰值强度的一种工程表述
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摘要
为了分析以PSD描述的随机振动载荷的峰值强度,将广泛应用于地震工程和冲击环境工程研究中的冲击响应谱概念拓展应用到随机振动峰值分析之中,从理论上导出了各态历经Gaussian随机振动过程冲击响应谱计算的一般方法,并导出了简化的工程应用表达形式。数值模拟结果验证了文中方法的正确性和简化分析结果的有效性。
The concept of SRS(Shock Response Spectral),which was widely applied in earthquake engineering and in shock environmental engineering,was developed to analyze the peak strength on random vibration loading defined by PSD(power spectral density).A gerneral method was proposed theoretically to compute SRS for an ergodic Gaussian procee random vibration and a simplified expression suitable for engineering application was educed.The numerical simulations was carried out to verify the correctness and validity of the proposed methods.
The concept of SRS(Shock Response Spectral),which was widely applied in earthquake engineering and in shock environmental engineering,was developed to analyze the peak strength on random vibration loading defined by PSD(power spectral density).A gerneral method was proposed theoretically to compute SRS for an ergodic Gaussian procee random vibration and a simplified expression suitable for engineering application was educed.The numerical simulations was carried out to verify the correctness and validity of the proposed methods.
引文
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[2]朱学旺.基于疲劳损伤的振动试验控制容差评价[J].航天器环境工程,2007,24(3):182—186.
[3]BENASCIUTTI D,TOVO R.Spectral Methods for Lifetime Prediction under Wide-band Stationary Random Processes[J].International Journal of Fatigue 2005,27:867—877.
[4]LALANNE C.Mechanical Vibration and Shock[M].London:Hermes Penton Ltd,2000.
[5]姚起杭,姚军.工程结构的振动疲劳问题[J].应用力学学报,2006,23(1):12—15.
[6]GJB 150,军用设备环境试验方法[S].
[7]中国航空工业第301研究所.MIL-STD-810F国防部试验方法标准,环境工程考虑与实验室试验[Z].北京:中国航空第301研究所,2000.
[8]QJ1184,海航导弹环境规范[S].
[9]张阿舟.实用振动工程[M].北京:航空工业出版社,1996.
[10]CHO C L,MIN F Y,YUH S T,Prediction of Shock Response for a Quadrupodmast Using Response Spectrum Analysis Method[J].Ocean Engineering 2002,29:887—914.
[11]朱学旺,范宣华,宁佐贵.特种包装产品公路运输环境振动室内模拟试验研究[J].强度与环境,2008,35(1):6—12.
[12]蒋瑜,陈循,陶俊勇,等.超高斯伪随机振动激励信号的生成技术[J].振动工程学报,2005,18(2):179—183.
[13]蒋瑜,陈循.基于时域随机化的超高斯真随机驱动信号生成技术研究[J].振动工程学报,2005,18(4):491—494.
[14]王述成,陈章位.随机振动试验中时域随机化技术的研究[J].机械工程学报,2005,41(5):230—233.
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