重叠网格在多浮体结构CFD中的应用

Application of Overlapping Grids in CFD of Multi-Floating Structures

针对复杂海洋环境下多浮体系统的流固耦合问题,基于CFD软件中的有限体积方法,使用重叠网格法模拟了多浮体系统在波浪作用下的运动响应;首先采用重叠网格法建模计算,得到不同海况下多浮体系统的运动响应;然后进行现场试验,结果表明:模拟仿真的运动情况与实验基本相符,俯仰角和响应周期具有一致性,采用重叠网格法能够很好地模拟多浮体系统在波浪中的运动姿态变化;继而通过数值计算,得到多浮体系统在三级海况下的偏航角、翻滚角、铰接力矩和垂直水面方向位移,为多浮体系统的稳定性设计提供参考数据。

Aiming at the fluid-solid coupling problem of multi-floating body system in complex marine environment,based on the finite volume method in CFD software,the motion response of multi-floating body system under the action of wave was simulated by overlapping grid method in this paper.The dynamic response of the multi-body floating system under different sea conditions was obtained by using the overlapping grid method,and then the field test was carried out.The results show that the simulated motion was basically consistent with the experiment,and the pitch angle was consistent with the response period.The overlapping mesh method can well simulate the motion and attitude change of the multi-floating body system in waves.By numerical calculation,the yaw angle,roll angle,hinge moment and vertical surface displacement of the multi-floating system were obtained,which provides reference data for the stability design of the multi-floating system.