多模块网架式网箱运动与载荷响应分析方法

Method of Motion and Load Response Analysis of Multi-Module Truss Fish Cage

以新型网架式模块化网箱为研究对象,提出一种适用于波流作用下多模块网箱水动力响应分析的数值计算方法。采用Morison公式计算作用在网箱上的波流载荷,基于铰接点的位移连续条件求解网箱铰接点处的铰接力,利用悬链线理论求解网箱受到的系泊力,进而建立多模块网箱运动耦合方程。通过求解该方程,获得网箱的运动和水动力载荷。通过与试验结果相对比,验证该数值方法在多模块网架式网箱水动力响应预报方面的准确性。采用该方法分析不同组合模式下的网箱水动力响应特性,为渔场平台的研发提供参考。

A numerical method for the hydrodynamic response analysis of multi-module cage under the action of wave and current is proposed.Morison equation is used to calculate the wave and current induced loads on the cage.The forces at the hinged joint of the cages are obtained by solving the equations based on the displacement continuity condition,and the mooring force is calculated using the catenary theory.Then,the coupled equations of the motion of the multi-module cage are established.By solving these equations,the motions and hydrodynamic loads of the cage are obtained.The numerical method is verified by comparing the numerical results with the experimental data.The hydrodynamic response characteristics of the cage under different combination modes is analyzed using the method,which can provide a theoretical basis for the development of aquaculture platform.