| 静水压力对水下环肋圆柱壳输入功率流的影响 |
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| 引用本文： | 刘志忠,李天匀,朱翔,张俊杰.静水压力对水下环肋圆柱壳输入功率流的影响[J].船舶力学,2011,15(3):301-312. |
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| 作者姓名： | 刘志忠 李天匀 朱翔 张俊杰 |
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| 作者单位： | 华中科技大学船海学院,武汉,430074;华中科技大学船海学院,武汉,430074;华中科技大学船海学院,武汉,430074;华中科技大学船海学院,武汉,430074 |
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| 摘 要： | 研究了考虑静水压力时水下环肋圆柱壳在周向余弦线分布力激励下的输入功率流特性。圆柱壳体和外流场的振动分别由Flügge壳体方程和Helmholtz波动方程描述,静水压力的影响以额外应力的形式计入壳体振动方程当中。探讨了静水压力对输入功率流的影响。结果表明外部静水压力使输入功率流曲线沿频率轴往左移动,即往低频方向移动。静水压力越大,影响越大;周向模态数越大,影响越大。文中结果对水下环肋圆柱壳的振动与噪声控制有一定的指导意义。
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| 关 键 词： | 静水压力 输入功率流 环肋圆柱壳 水下圆柱壳 |
Effect of Hydrostatic Pressure on Input Power Flow in Submerged Ring-stiffened Cylindrical Shells |
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| LIU Zhi-zhong,LI Tian-yun,ZHU Xiang,ZHANG Jun-jie.Effect of Hydrostatic Pressure on Input Power Flow in Submerged Ring-stiffened Cylindrical Shells[J].Journal of Ship Mechanics,2011,15(3):301-312. |
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| Authors: | LIU Zhi-zhong LI Tian-yun ZHU Xiang ZHANG Jun-jie |
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| Institution: | LIU Zhi-zhong,LI Tian-yun,ZHU Xiang,ZHANG Jun-jie(Department of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | The input power flow for an infinite ring-stiffened cylindrical shell submerged in fluid induced by a cosine harmonic circumferential line force under conditions of a uniform external hydrostatic pressure field is investigated in this paper.The motion of the shell and the pressure field of the ly.The effect of the external pressure field is modeled by including static prestress terms in the shell equations of motion.The effects of hydrostatic pressure on the input power flow are examined.The results show that the external pressure shifts the curves of input power flow to left along the frequency axis.The effect is more obvious with higher external pressure and circumferential mode.It will give some guidelines for vibration and noise control of this kind of shell. |
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| Keywords: | hydrostatic pressure input power flow ring-stiffened shell submerged shell |
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