焊接线能量和焊接顺序对加筋板声振特性影响试验研究  

Experimental study on vibro-acoustic characteristics of stiffened plates for different welding energy inputs and welding sequences

作　　者：陈梓恒 彭利国 林永水[3] 冯喜良 吴卫国[2] CHEN Zi-heng;PENG Li-guo;LIN Yong-shui;FENG Xi-liang;WU Wei-guo;无(School of Naval Architecture,Ocean and Energy Power Engineeringa,Wuhan University of Technology,Wuhan 430063,China;Green&Smart River-Sea-Going Ship,Cruise Ship and Yacht Research Center,Wuhan University of Technology,Wuhan 430063,China;School of Science,Wuhan University of Technology,Wuhan 430070,China;Wuchang Shipbuilding Industry Group Co.,Ltd.,Wuhan 430000,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,武汉430063 [2]武汉理工大学绿色智能江海直达船舶与邮轮游艇研究中心,武汉430063 [3]武汉理工大学理学院,武汉430070 [4]武昌船舶重工集团有限公司,武汉430000

出　　处：《船舶力学》2024年第10期1622-1632,共11页Journal of Ship Mechanics

基　　金：工业和信息化部高技术船舶项目(MC-201917-C09)。

摘　　要：在满足结构强度要求的焊接工艺规范下,焊接线能量和焊接顺序会影响船舶上典型双向加筋板结构焊接残余应力的大小与分布,从而影响其声振特性。为探究焊接工艺参数对典型双向加筋板结构声振特性的影响规律,采用数值与试验相结合的方法验证焊接结构试验方法的准确性,开展不同焊接线能量和焊接顺序下加筋板结构模态、水下振动和声辐射试验研究。试验结果表明:在相同焊接顺序下,不同的焊接线能量对薄板的固有频率影响较大,对厚板的固有频率影响相对较小;对于厚板加筋结构而言,在相同焊接顺序下,随着焊接线能量的增加,对固有频率的影响呈现先减小、后增大的趋势,相同频段内的振动加速度和辐射声压总级也呈现先减小、后增大的趋势;在对称焊接顺序下,焊接电流为200 A,焊接电压为25 V,焊接速度为3.02~3.06 mm/s,焊接线能量为167 J/cm时,结构的声振特性最优。本研究可为船舶与海洋结构物声隐身性的低噪声工艺设计提供指导。Under the welding process specifications that meet the structural strength requirements,welding energy input and welding sequence result in different welding residual stress and deformation,which significantly impact the typical bidirectional stiffened plate structure’s vibration and acoustic radiation.In order to explore the influence of welding process parameters on the vibro-acoustic characteristics of typical bidirectional stiffened plate structures,the accuracy of the welded structure test method was verified by combining numerical simulation and experiment,several tests of stiffened plate structures were carried out regarding the modal,underwater vibration,and acoustic radiation under different welding energy inputs.The results show that under the same welding sequence,different welding energy inputs have a large effect on the natural frequency of thin plates and a relatively small effect on the natural frequency of thick plates.For stiffened thick plate structures,under the same welding sequence,with the increase in welding energy input,the impact on the natural frequency shows a trend of first decreasing and then increasing,and the overall vibration acceleration level and radiated sound pressure level in the same frequency band decrease first and then increase.Under the symmetrical welding sequence,the optimal welding parameters cover a welding current of 200 A,a welding voltage of 25 V,a welding speed of 3.02-3.06 mm/s,and a welding energy input of 167 J/cm.This study can provide guidance for the design of low-noise processes for acoustic stealth of ships and marine structures.

关 键 词：焊接线能量 焊接顺序 加筋板 试验研究 声振特性 

分 类 号：TB53[理学—物理]