SUBOFF潜艇近水面航行的波浪力和运动响应数值模拟

Numerical Simulation of Wave Forces and Motion Response of SUBOFF Submarine Sailing near the Surface

潜艇在近水面航行时受到非线性波浪力的作用,其运动姿态和定深航行难以控制,从而对导弹水下正常发射造成影响。论文用近场积分法计算潜艇所受的二阶定常力与力矩,采用Newman近似法计算潜艇在时域不规则波作用下的低频二阶力。针对椭球模型,用Newman的计算结果验证了数值计算的有效性和准确性。以国外公开的潜艇模型为案例,对潜艇在不同海况及潜深下的运动响应进行时域分析。结果表明,低频二阶力作用下潜艇的纵摇幅值变化明显,低频慢漂作用对潜艇横荡和垂荡有较大影响。

When a submarine is sailing near the surface,it is difficult to control the depth and motion attitude of the submarine in near-surface navigation due to the action of nonlinear wave force,which affects the normal underwater launch of a missile.In this paper,the second-order steady force(moment)of the submarine is calculated by the near-field method,and the second-order force of the submarine under an irregular wave is calculated by the Newman approximation.The validity and accuracy of the numerical calculation are verified by numerical calculation of the underwater ellipsoid of Newman’s results.To further explore the motion performance of the submarine,the time-domain analysis of the motion response and dynamic response of the submarine under different sea conditions and depths is carried out by taking the overseas open submarine model as an example.The results show that the pitch amplitude of the submarine varies obviously under the action of low-frequency second-order force,and the low-frequency slow-drift action has a great influence on the sway and heave motions of the submarine.