﻿ 舰艇在海浪作用下的扰动仿真分析
 舰船科学技术  2017, Vol. 39 Issue (3): 46-48 PDF

Naval ship force simulation due to wave disturbance
ZHU Shi-yong
Naval Military Representative Office in Jiangnan Shipyard (Group) Co.Ltd., Shanghai 201913, China
Abstract: Naval ship maneuvering and motion is influenced by many factors in actual ocean environment. Based on the numerical simulation of long-crested irregular wave, this paper proposes the calculation method of wave disturbance to naval ship. Based on the spectral analysis, we analysis the main factor of disturbance. These help to know more about the simulation of ship motion in the ocean.
Key words: long-crested wave     wave disturbance
0 引　言

1 模型建立

 ${\rm{\zeta }} = {{\rm{\zeta }}_{{a}}}{\rm{cos}}\left( {{{{k}}_1}{{x}} + {{{k}}_2}{{y}} - {{\rm{\omega }}_{{e}}}{{t}}} \right){\text{。}}$ (1)

 ${{Y}} = {\rm{\rho }g}{{{k}}_2}{{\rm{\zeta }}_{{a}}}\mathop \smallint \nolimits^ {{A}}\left( {{x}} \right)\sin \left( {{{{k}}_1}{\rm{x}} - {{\rm{\omega }}_{{e}}}{\rm{t}}} \right){\rm{d}}x{\text{，}}$ (2)

 ${{Y}} \!\!=\!\! 2{\rm{\rho }}g{{\rm{\zeta }}_{{a}}}\mathop \smallint \nolimits^ {T}\left( {{x}} \right){{{e}}^{ - {{kT}}\left( {{x}} \right)/2}}{\rm{sin}}\left( {\frac{{{{{k}}_2}{{B}}\left( {{x}} \right)}}{2}} \right)\cos \left( {{{{k}}_1}{{x}} \!-\! {{\rm{\omega }}_{{e}}}{{t}}} \right){\rm{d}}x{\text{，}}$ (3)

 ${{N}} \!\!=\!\! 2{\rm{\rho }}g{{\rm{\zeta }}_{{a}}}\mathop \smallint \nolimits^ {{{e}}^{ - \frac{{{{kT}}\left( {{x}} \right)}}{2}}}\!\!{{T}}\left( {{x}} \right){\rm{sin}}\left( {\frac{{{{{k}}_2}{{B}}\left( {{x}} \right)}}{2}} \right)\cos \left( {{{{k}}_1}{\rm{x}} \!-\! {{\rm{\omega }}_{{e}}}{{t}}} \right){\rm{d}}x{\text{。}}\!\!\!$ (4)

 ${\rm{\zeta }} = \mathop \sum \limits_{{\rm{i}} = 1}^{\rm{n}} {{\rm{\zeta }}_{{\rm{ai}}}}{\rm{cos}}\left( {{{{k}}_1}{\rm{cos\mu }} + {{{k}}_2}{\rm{sin\mu }} - {{\rm{\omega }}_{\rm{e}}}{{t}} + {{\rm{\varepsilon }}_{\rm{i}}}} \right){\text{。}}$ (5)

2 仿真分析

 图 1 波浪曲线 Fig. 1 Wave line

 图 2 横荡力矩 Fig. 2 Sway moment

 图 3 首摇力矩 Fig. 3 Raw moment

 图 4 频谱分析 Fig. 4 Spectral analysis
3 结　语

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