针对设备动力参数未知，设备基座振动加速度给定情况，提出阻抗分析法解决设备振动激励载荷下的船舶结构动力分析问题。基于理论分析，提出阻抗分析法，实现设备对基座的振动能量采取振动加速度激励作为输入，进而分析结构动力响应；通过舱段结构动力分析验证方法的有效性，并讨论不同加载方式对结构动力响应的影响规律，研究表明，该方法应用于结构声振分析是可行的，且加载方式对结构响应影响较大;在此基础上，将阻抗分析法应用于水下航行器水下声辐射研究，分析水下航行器声场周向分布规律。结果表明激励频率较低时水下航行器水下声场呈对称分布，随着频率提高，其对称性逐渐下降。
Abstract
For the case of equipments with locally unknown dynamic parameters and given under-chassis vibration acceleration, the impedance analysis method was proposed to solve the dynamic response of ships.The alternative energy input was achieved in accordance with the under-chassis vibration acceleration.The validity of the method was verified through the dynamic analysis of a ship compartment and the effects of different under-chassis loading ways were investigated.The results show that the method applied to the structural vibration analysis is feasible and the loading ways have a great influence on the dynamic structural responses.On this basis, the method was applied to study the submarine underwater acoustic radiation.The sound radiation distribution along the circumference was examined.The results show that with the increase of frequency, the inhomogeneity of the sub acoustic radiation is enhanced gradually.
关键词
结构动力响应 /
阻抗 /
振动加速度 /
水下辐射噪声
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Key words
structural dynamic response /
impedance /
vibration acceleration /
underwater acoustic radiation
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参考文献
[1] Fulford R A, Gibbs B M. Structure-borne sound power and source characterization in multi-point-connected system part II: About mobility function and free velocities [J]. Journal of Sound and Vibration, 1997, 220(2): 203~224
[2] 束长庚. 有限元解析法在船舶板架振动计算中的应用[J]. 舰船科学技术, 1979, 5(2): 39-56.
SHU Changgeng. Application of finite element analytical method in ship plate vibration calculation [J]. Chinese Journal of Ship Research, 1979, 5(2): 39-56.
[3] 邹春平, 陈端石, 华宏星. 船舶结构振动特性研究[J]. 船舶力学, 2003, 7(2): 102-115.
ZOU Chunping, CHEN Duanshi, HUA Hongxing. Study on structural vibration characteristics of ship [J]. Journal of Ship Mechanics, 2003, 7(2): 102-115.
[4] 庞福振 姚熊亮. 声学覆盖层对潜艇抗水下爆炸能力的影响研究[J]. 振动与冲击, 2011, (4): 103-108.
PANG Fuzhen, YAO Xiongliang, Influence research of acoustic titles to the anti-underwater explosion capability of a submersible structure [J]. Journal of Vibration and Shock. 2011, (4): 103-108..
[5] 缪旭弘, 钱德进. 基于ABAQUS声固耦合法的水下结构声辐射研究[J]. 船舶力学, 2009, 13(2): 319~323.
MIAO Xuhong, QIAN Dejian. Sound radiation of underwater structure based on coupled acoustic-structural analysis with ABAQUS[J]. Journal of Ship Mechanics, 2009, 13(2): 319~323
[6] Guo Y P. Sound scattering by bulkheads in cylindrical shells [J]. Journal of the Acoustical Society of America, 1994, 95(5): 2550~2559.
[7] 崔晓兵, 季振林. 快速多极子边界元法预测船舶舱室噪声[J]. 噪声与振动控制, 2013, 32(6): 179-183.
CUI Xiaobing, JI Zhenlin. Fast multipole boundary element method for prediction of ship cabin’s noise [J]. Noise and vibration control, 2013, 32(6): 179-183.
[8] Janssen M H A. The use of an equivalent forces method for the experimental quantification of structural sound transmission in ship [J]. Journal of Sound and Vibration, 1999, 226(2):305~328
[9] 庞福振. 船舶结构噪声截断模型数值预报方法研究.[D]. 哈尔滨:哈尔滨工程大学, 2012.
PANG Fuzhen. Numerical Research on Truncated Model Method of Ship Structural Borne Noise Prediction [D]. Harbin Engineering University, 2012.
[10] Fiedler, Ch., and H. G. Schneider, “BeTSSi-Sub—Benchmark Target Strength Simulation Submarine,” Technical Report, Forschungsanstalt der Bundeswehr für Wasserschall und Geophysik, Kiel, 2002.
[11] 邹春平. 船舶水下辐射噪声特性研究[J]. 船舶力学, 2004, 8(1)：112~124.
ZOU Chunping. Study on characteristics of ship underwater radiation noise [J]. Journal of Ship Mechanics, 2004, 8(1)：112~124..
[12] 商德江，何祚镛. 加肋双层圆柱壳振动声辐射数值计算分析[J].声学学报, 2001, 26(3): 193-201.
SHANG Dejiang, HE Zuoyong. The numerical analysis of sound and vibration from a ring-stiffened cylindrical double-shell by FEM and BEM [J]. Acta Acustica, 2001, 26(3): 193-201.
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