浸没在流场中的双壳结构波动特性  

Fluctuation characteristics of double cylindrical shell submerged in flow field

作　　者：张玲[1] 吴宏悦 计方[2,3] 

机构地区：[1]海军装备部,北京100841 [2]中国舰船研究院,北京100192 [3]哈尔滨工程大学,黑龙江哈尔滨150001

出　　处：《舰船科学技术》2013年第3期40-46,共7页Ship Science and Technology

基　　金：中国博士后科学基金资助项目(2012M520713)

摘　　要：以浸没在流体声介质中的双层圆柱壳为研究对象,给出了静压下双壳流固耦合系统频散方程,基于Muller-Newton法和围线积分法分别开展了实数域和复数域频散方程的计算。探索了静水压力对双壳频散特性和输入功率流的影响规律。在此基础上,分析了不同周向模态下双壳结构波的传递性质。结果表明:4.5 MPa静水压力降低了高阶周向模态下低阶波的传播速度;在n=0时静水压力增大了输入功率流的峰值;各种传播波随着无量纲频率的增加表现为弯曲波、拉伸波和扭转波等形式。Taking double cylindrical shell submerged in sound intermediate as investigated subject, the dispersion equation of liquid-solid coupled double cylindrical shell under hydrostatic pressure is deduced. The calculation of dispersion equation in real number field and complex number field are carried out through Muller-Newton method and wedding integral method. The influences of hydrostatic pressure on its dispersion characteristics and input power flow are discussed. Furthermore, wave propagation characteristics of double cylindrical shell under different circumferential modals. The result shows that the lower order wave velocity is reduced by 4.5 MPa hydrostatic pressure under higher order circumferential modal, and the peak value of input power flow is enhanced at n = 0. The waves are propagated through flexural wave, longitudinal wave and tensional wave with the growth of dimensionless frequency.

关 键 词：双层圆柱壳 静水压力 频散特性 输入功率流 波动特性 

分 类 号：U661.44[交通运输工程—船舶及航道工程]