Influence of welding-induced residual stress on underwater acoustic radiation of ring stiffened cylindrical shell

被引：0
|
作者：
Li L.-X. [1 ,2 ]
Liu Y. [3 ]
Chen L.-Y. [1 ]
机构：
[1] State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai
[2] China Ship Development and Design Center, Wuhan
[3] Shanghai Branch, China Ship Scientific Research Center, Shanghai
来源：
Chuan Bo Li Xue | / 5卷 / 628-634期
关键词：
Acoustic radiation; Ring stiffened cylindrical shell; Welding-induced residual stress;
D O I：
10.3969/j.issn.1007-7294.2016.05.014
中图分类号：
学科分类号：
摘要：
This paper focuses on the influence of welding residual stress on underwater acoustic radiation of ring stiffened cylindrical shell. The thermal elastic-plastic finite element method is used to simulate ring stiffened cylindrical shell butt welding process and to calculate the three-dimensional welding-induced residual stress and strain field. And the dynamic characteristic of ring stiffened cylindrical shell with residual stress is investigated. Finally, its acoustic radiation is solved by combining direct boundary element method with finite element method. The results show that residual stress has a significant impact on underwater acoustic radiation of ring stiffened cylindrical shell under low frequency excitation. It makes acoustic radiation power and sound pressure curve integrally move toward lower frequency, and makes acoustic radiation power and sound pressure increase at most excitation frequencies comparing with structure without residual stress. © 2016, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：628 / 634
页数：6
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