摘要
针对水中悬浮隧道在波浪力作用下动力响应的问题,通过柔度系数法推导得到了悬浮隧道的等效刚度系数,考虑了不同自由度运动之间的耦合作用,建立了悬浮隧道管段的动力响应模型,在时间域内采用逐步积分法迭代求解其运动控制方程。波浪力采用Airy线性波理论和Morison方程计算。计算结果表明,在波浪力作用下悬浮隧道管段产生较大的横荡位移,且随着波频或锚索中预张力的减小,响应振幅增大。在悬浮隧道的动力响应分析中,若不考虑不同自由度运动之间的耦合作用,会过低估计垂荡响应的幅值。
Dynamic response of submerged floating tunnel due to regular wave forces is investigated. The equivalent stiffness coefficients are derived with softness factor method, and the dynamic model of submerged floating tunnel is presented considering the coupling among various degrees-of-freedom. The nonlinear motion equation is solved in the time domain by step-by-step integration scheme. The wave forces on the tunnel tube are calculated following Airy linear wave theory and Morison equation. The simulated results show that surge response is much more remarkable than responses in the other degrees-of-freedom under wave condition. As the wave frequency or the tether pretension decreases, response amplitudes increase. The heave response may be highly underestimated if the coupling effect among various degrees-of-freedom is ignored in the submerged floating tunnel response analysis.
出处
《应用力学学报》
EI
CAS
CSCD
北大核心
2008年第2期207-211,共5页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金重点项目(10532070)
关键词
水中悬浮隧道
动力响应
逐步积分法
耦合
阿基米德桥
submerged floating tunnel, dynamic response, step-by-step integration, coupling, Archimedes bridge
