| 基于波传播分析的水下粘弹性复合圆柱壳振动功率流研究 |
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| 引用本文： | 严谨,李天匀,刘敬喜,朱翔.基于波传播分析的水下粘弹性复合圆柱壳振动功率流研究[J].船舶力学,2007,11(5):780-787. |
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| 作者姓名： | 严谨 李天匀 刘敬喜 朱翔 |
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| 作者单位： | 华中科技大学交通学院,武汉,430074;华中科技大学交通学院,武汉,430074;华中科技大学交通学院,武汉,430074;华中科技大学交通学院,武汉,430074 |
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| 摘 要： | 采用波传播分析方法,讨论了外部敷设粘弹性自由阻尼材料的无限长圆柱壳在流场中受径向简谐激励的振动功率流.用复模量形式计及粘弹性阻尼的损耗因子,研究了自由阻尼圆柱壳在外激励作用下的输入功率流和沿壳体传播的功率流.结果表明粘弹性阻尼层可以明显降低激振力输入壳体的功率流,加快振动波在结构内的衰减,为潜艇结构和水下各种管道的减振降噪提供了一定的理论参考.
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| 关 键 词： | 粘弹性阻尼 圆柱壳-流场耦合系统 波传播方法 振动功率流 |
| 文章编号： | 1007-7294（2007）05-0780-08 |
| 修稿时间： | 2006-11-15 |
Power flow analysis of a submerged cylindrical shell coated by viscoelastic materials with wave propagation approach |
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| YAN Jin,LI Tian-yun,LIU Jing-xi,ZHU Xiang.Power flow analysis of a submerged cylindrical shell coated by viscoelastic materials with wave propagation approach[J].Journal of Ship Mechanics,2007,11(5):780-787. |
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| Authors: | YAN Jin LI Tian-yun LIU Jing-xi ZHU Xiang |
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| Abstract: | Employed wave propagation approach,the vibrational power flow of a submerged infinite cylindrical shell coated with unconstrained viscoelastic layer excited by a radical harmonic force is studied.The damping factor of the damping material is considered by complex Young's modulus.Vibrational power flow input and transmission along the shell axial direction in a damped cylindrical shell are discussed,respectively.The numerical results indicate the unconstrained viscoelastic layer can obviously reduce the power flow input and rapidly attenuate the power flow transmission,which may be valuable to the application of damping material on noise and vibration control of submarines and underwater pipes. |
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| Keywords: | viscoelastic damping shell-fluid coupled system wave propagation approach power flow |
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