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焊接残余应力对环肋圆柱壳声辐射特性影响分析
Research on the influence of welding residual stress on acoustic radiation characteristics of ring-stiffened cylindrical shell
郭永晋1, 孔令清2, 陈炉云1, 王鸿东1
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作者单位:1. 上海交通大学 海洋工程国家重点实验室, 上海 200240;
2. 江南造船(集团)有限责任公司, 上海 201913
中文关键字:环肋圆柱壳;焊接残余应力;声辐射功率;声辐射指向性
英文关键字:ring-stiffened cylindrical shell; welding residual stress; acoustic radiation power; acoustic radiation directivity
中文摘要:以环肋圆柱壳为对象,开展焊接残余应力对结构声辐射特性影响的研究。建立含预应力的圆柱壳结构声辐射理论方程,以此为基础,建立结构模型,开展数值分析。以残余应力为变量,研究了残余应力幅值和焊缝类型对结构声辐射功率和声辐射指向性的影响。结果表明,由于焊接残余应力的存在,改变了结构的刚度,继而影响了结构的声辐射特性,且其影响程度与残余应力幅值和焊缝类型有关。研究结果可为精确预报结构声辐射特性提供参考。
英文摘要:The ring-stiffened cylindrical shell was taken to research the influence of welding residual stress on the structural acoustic radiation characteristics. The structural-acoustic equation of cylindrical shell with pre-stress was proposed. The structural model was established to conduct the numerical analysis. The residual stress was applied as a variable to research the influence of residual stress amplitude and weld type on structural acoustic radiation power and acoustic radiation directivity. The results show that due to the welding residual stress, the stiffness of the structure is changed, then the structural acoustic radiation characteristics is influenced. The extent of influence is related to the stress amplitude and weld type. The research can provide a reference for the accurate prediction of structural acoustic radiation characteristics.
2019,41(6): 9-14 收稿日期:2018-07-19
DOI:10.3404/j.issn.1672-7649.2019.06.002
分类号:U661.44
基金项目:上海市青年科技英才扬帆计划资助项目(18YF1411500)
作者简介:郭永晋(1990-),男,博士研究生,研究方向为舰船振动噪声与建造质量控制
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