摘要
建立了水中悬浮隧道的锚索在波流场中顺流向涡激振动的数学模型,并考虑了波浪作用下,悬浮隧道的运动引起的强迫激励和参数激励对锚索顺流向涡激振动的影响。应用Galerkin方法和数值积分法,计算分析外激励频率对锚索顺流向涡激振动的影响。计算结果表明,外激励作用下锚索顺流向涡激振动的振幅明显增大,且当外激励频率接近锚索一阶自振频率时,振幅达到最大值。
A vortex-induced in-line vibration model is formulated for the calculation of nonlinear dynamic response of submerged floating tunnel （SFT） tethers due to wave and current effects. The effect of tunnel surge motion on the dynamic response of a tether is investigated by considering the forcing and parametric excitations. Galerldn method and numerical integration were used in the study. Numerical relationship between the excitation frequency and the maximum amplitude of vortex-induced in-line vibration was obtained. The calculated results show that the amplitude of vortex-induced in-line vibration increased when considering the effects of forcing and parametric excitations and the amplitude approached its maximum when the excitation frequency approached the first-order natural frequency of the tether.
出处
《工程力学》
EI
CSCD
北大核心
2006年第A01期217-221,共5页
Engineering Mechanics
基金
国家自然科学基金重点资助项目(10532070)
