摘要
提出了一种求解内部复杂结构的水下圆柱壳声振特性的计算方法,计算了含内部结构的加筋圆柱壳附水壳体的低频段振动响应及全频段声辐射特性,低频段采用有限元(FE)法,中、高频段采用统计能量分析(SEA)法,实验验证了有限元-统计能量分析(FE-SEA)方法的准确性。结果表明:低频段振动响应和全频段声辐射计算结果与实验结果吻合良好,FE和SEA方法分别在1~1000 Hz和1~10 kHz范围内可获得较准确的结果,说明FE-SEA方法求解含内部结构的圆柱壳的声振特性是可行的,但需要确定不同频段的计算方式。由于网格质量的限制,FE方法对中、高频的计算不具有优势,SEA方法关注结构平均功率流,无法获得具体位置振动响应。
In this paper,a method for calculating the acoustic and vibration characteristics of an underwater cylindrical shell with a complex internal structure is proposed.This work analyzes the vibration response and acoustic radiation characteristics of an internal structure enclosed in a stiffened cylindrical shell.The finite element(FE)method was used in the low-frequency band,and the statistical energy analysis(SEA)method was used in the medium and high-frequency bands.Through experimentations,the accuracy of the FE-SEA approach was confirmed.Results indicate a good agreement between the experimental and calculated results for the low-frequency vibration response and full-frequency acoustic.FE and SEA have good results in the range of 1-1000 Hz and 1-10 kHz,respectively.This shows that the FE-SEA method is feasible for investigating the acoustic and vibration characteristics of cylindrical shells with internal structure,and it needs to determine the calculations of different frequency bands.It should be noted that because of the mesh quality limitations,FE method is not beneficial for medium and high-frequency calculations.The SEA method focuses on the average power flow of the structure and cannot obtain the vibration response of the specific position.
作者
陈磊
李鹏
陈浩然
CHEN Lei;LI Peng;CHEN Haoran(School of Mechanics and Aeronautics,Southwest Jiaotong University,Chengdu 610031,Sichuan,China)
出处
《西南科技大学学报》
CAS
2024年第2期83-91,共9页
Journal of Southwest University of Science and Technology
基金
国家自然科学基金(12072298,12172311)。
关键词
有限元法
统计能量分析法
全频段
声振特性
加筋圆柱壳
FE method
SEA method
Full bands
Acoustic and vibration characteristics
Stiffened cylindrical shell
