带窄缝多箱体系统波浪荷载特性分析
发布时间：2019-04-03 07:00
【摘要】：针对波浪与带有窄缝多固定直角箱体结构作用产生的流体共振问题,建立了非线性波浪荷载分析二维时域模型。该模型采用域内源造波技术产生入射波浪,自由水面满足完全非线性运动学和动力学边界条件,窄缝内自由水面引入人工阻尼来等效由于涡旋运动和流动分离引起的粘性耗散,建立边界积分方程并采用高阶边界元离散求解物面上速度势等未知量,进而利用加速度势的方法来求得速度势时间导数,并基于伯努利方程积分得到作用结构上的瞬时波浪荷载。通过模拟带两窄缝的三箱体所受水平力与垂向力,并与已发表结果对比验证了模型的准确性。同时通过大量的数值计算,分析了箱体数量对各箱体所受波浪荷载大小及变化规律的影响。
[Abstract]:In order to solve the problem of fluid resonance caused by the interaction between wave and multi-fixed right angle box structure with narrow slot, a two-dimensional time-domain model for nonlinear wave load analysis is established. In this model, the incident waves are generated by the technique of intra-domain wave generation, and the free water surface satisfies the fully nonlinear kinematic and dynamic boundary conditions, and the free water surface in the narrow slot is equivalent to viscous dissipation caused by vortex motion and flow separation by introducing artificial damping into the free water surface. The boundary integral equation is established and the unknown quantities such as velocity potential on the surface are solved by means of high order boundary element discretization, and then the time derivative of velocity potential is obtained by using the method of acceleration potential. Based on the Bernoulli equation, the instantaneous wave loads on the structure are obtained. The accuracy of the model is verified by simulating the horizontal force and vertical force of the three-box body with two narrow slots and comparing with the published results. At the same time, through a large number of numerical calculations, the influence of the number of boxes on the magnitude and variation of wave loads on each box is analyzed.
【作者单位】： 大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金项目(51179028,51222902,51221961) 教育部新世纪优秀人才计划项目(NCET-13-0076) 中央高校基本科研业务费专项资金项目(DUT14YQ206)
【分类号】：P752;P731.2
本文编号：2453003
[Abstract]:In order to solve the problem of fluid resonance caused by the interaction between wave and multi-fixed right angle box structure with narrow slot, a two-dimensional time-domain model for nonlinear wave load analysis is established. In this model, the incident waves are generated by the technique of intra-domain wave generation, and the free water surface satisfies the fully nonlinear kinematic and dynamic boundary conditions, and the free water surface in the narrow slot is equivalent to viscous dissipation caused by vortex motion and flow separation by introducing artificial damping into the free water surface. The boundary integral equation is established and the unknown quantities such as velocity potential on the surface are solved by means of high order boundary element discretization, and then the time derivative of velocity potential is obtained by using the method of acceleration potential. Based on the Bernoulli equation, the instantaneous wave loads on the structure are obtained. The accuracy of the model is verified by simulating the horizontal force and vertical force of the three-box body with two narrow slots and comparing with the published results. At the same time, through a large number of numerical calculations, the influence of the number of boxes on the magnitude and variation of wave loads on each box is analyzed.
【作者单位】： 大连理工大学海岸和近海工程国家重点实验室;
【基金】：国家自然科学基金项目(51179028,51222902,51221961) 教育部新世纪优秀人才计划项目(NCET-13-0076) 中央高校基本科研业务费专项资金项目(DUT14YQ206)
【分类号】：P752;P731.2
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