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通过对沉箱结构在波浪作用下动力响应的模拟研究,探讨了一种有裙钢质沉箱的适用性,这种沉箱可利用负压效应来保持它自身的稳定。对于这种在沉箱底部和海底之间具有负压作用的沉箱,采用了“沉箱结构与海底相互作用分析法”在频率域中进行了动力响应数值计算。文中假定沉箱结构的分析模型是一个带有裙边的刚性棱柱体,在其底部设有若干个正方形的隔室(compartment),负压就作用在每个隔室上;此外,还假定海底是一种液体饱和的多孔弹性体,其特性符合blot的波浪传播理论。沉箱裙边的长度以及作用在隔室上的负压对于沉箱动力响应的影响,也通过数值计算的方法进行了研究。其结论是:这种类型的沉箱应用于软质海底是相当有效的。如果海底上的渗透性差,只要为沉箱提供隔室,则它也会具有同样的优点。
Through the simulation study on the dynamic response of caisson structure under the action of wave, the applicability of a skirted steel caissons was discussed. The caisson can use the negative pressure effect to maintain its own stability. For the caisson with negative pressure between the bottom of the caisson and the sea floor, a numerical calculation of the dynamic response in the frequency domain was carried out using the “caisson structure and submarine interaction analysis method”. It is assumed that the analysis model of caissons structure is a rigid prismatic body with skirts, at the bottom of which there are several square compartments, and negative pressure acts on each compartment. In addition, it is also assumed that the seabed is A liquid-saturated porous elastomer that meets the wave propagation theory of blot. The length of the caisson skirt and the effect of the negative pressure acting on the compartment on the dynamic response of the caissons were also studied numerically. The conclusion is that this type of caisson is quite effective when applied to a soft sea floor. If the permeability on the seabed is poor, it will have the same advantage as long as the compartment is provided for caissons.