水下系泊监测平台动态响应的计算模型与数值模拟

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A calculation model and numerical simulation for underwater monitoring platform were formulated aimed at the dynamic response by the action of flow force, based on Hopkinson impact load theory, taken into account the catenoid effects of mooring cable and revised the difference of tension and tangential direction action force by equivalent modulus of elasticity. And the equation was solved by hydraulics theory and structural mechanics theory of oceaneering, and the response of buoy on flow force was studied. Through the results the conclusion can be obtained the buoy will engender biggish heave and swaying displacement, but the swaying displacement approaches stable quickly and the heaven displacement prodnces vibration for the vortex―induced action by the flow.基于Hopkinson冲击载荷理论，针对水下系泊监测平台在水流作用下的动态响应，考虑系泊缆的垂度效应，采用等效弹性模量法修正拉力和弦向作用力之间的差异，建立了水下系泊监测平台的计算模型和数值分析模型。利用水力学理论、海洋工程结构力学理论以及流固耦合的方法分别对计算模型和数值分析模型进行求解，研究了浮体在水流作用下的动态响应特性。结果表明，浮体会产生较大的垂荡位移和横荡位移，横荡位移很快趋于平稳，垂荡位移受水流涡激升力的影响会产生振动。