【摘要】 离岸深水全直桩码头,由于其桩基的自由高度大、柔度增加、自振周期长,且位于无掩护开敞海域,波浪与结构相互作用问题突出。如何考虑流固耦合作用对桩上波浪力的影响,并建立便于工程应用的计算方法,是工程实践提出的亟待解决的课题。文中利用有限元软件ADINA建立了水体和桩基结构相互作用的三维有限元数值模型,并采用有限元数值模型对考虑流固耦合影响的改进Morison波浪力计算公式进行了验证。采用改进Morison波浪力计算公式研究了流固耦合对桩身波浪力的影响,并给出了考虑流固耦合影响的波浪力放大系数图表。在此基础上,提出了考虑流固耦合影响的波浪力简化计算方法。更多还原

【Abstract】 For all-vertical-piled wharf in offshore deep-water, piles have greater free height and flexibility, and longer natural vibration period, and in general, there is no shield in deep water. All the above factors result in a much more significant fluid-structure interaction to all-vertical-piled wharf. How to figure out the effect of FSI on wave force and establish a practical calculation method is requisite in engineering application. A 3D finite element numerical model of a FSI and numerical waves was established by ADINA. The modified Morison equation has been proved by the 3D finite element numerical model. Furthermore, with the modified Morison equation, the effect of FSI on wave force was analyzed, and the amplification coefficients of wave force due to FSI have been worked out.Finally, the simplified calculation method of wave force on piles under the effect of FSI was established.更多还原