摘要
将随机振动理论中的虚拟激励法引入到海洋立管涡激振动计算中,建立了相应的数值方法,编制计算程序实现了海洋立管在流向与横向两个自由度上的随机振动响应分析。对横向振动进行了实验模型计算,通过与实验对比,检验了将虚拟激励法应用于立管涡激振动的可行性;并记录了此方法的计算时间,验证了此方法的快速性。应用P-M准则,对响应进行分析得到立管的年损伤率,实现了深海立管的疲劳损伤预报。本分析方法可为海洋立管涡激振动响应计算和工程设计提供参考。
By introducing Pseudo-excitation method of the random vibration theory into VIV calculation of a marine riser, a numerical calculation method was established. The analysis of in-line and flow-cross 2-DOF random vibration responses of the marine riser was performed via the programming codes based on this method. Comparing the calculation results of the flow-cross response of the riser with the terst ones, the feasibility of application of Pseudo-excitation method in VIV calculation of the marine riser was verified. The computing time was recorded to validate the higher calculation efficiency of this new method. The fatigue was predicted based on the P-M criterion. engineering design of a marine riser. damage rate of the riser per year was evaluated and the service life of the riser The study results provided a reference for calculation of VIV response and
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第19期99-103,共5页
Journal of Vibration and Shock
基金
创新研究群体科学基金(50921001)
国家重点基础研究发展计划项目(2010CB832700)
关键词
涡激振动
疲劳损伤
随机振动
虚拟激励法
vortex induced vibration （VIV）
fatigue damage
random vibration
pseudo-excitation method
