基于有限元模拟的穿孔等离子超声电弧焊谐振频率的确定

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英文篇名：Investigation in resonance frequency of keyhole plasma ultrasound-arc welding based on FEM simulation 作者：谢伟峰 ; 雷玉成 ; 朱强 ; 夏晓萍 英文作者：XIE Weifeng1,LEI Yucheng1,ZHU Qiang1,XIA Xiaoping2(1.School of Material Science and Engineering,Jiangsu University,Zhenjiang 212013,China;2.Tianjin Xingang Shipbuilding Heavy Industry Co.,Ltd.,Tianjin 300456,China) 关键词：穿孔等离子弧焊 ; 超声电弧 ; CLAM钢 ; 模态分析 ; 谐振频率 英文关键词：keyhole plasma arc welding;arc ultrasonic;CLAM steel;modal analysis;resonant frequency 中文刊名：HJXB 英文刊名：Transactions of the China Welding Institution 机构：江苏大学材料科学与工程学院;天津新港船舶重工有限责任公司; 出版日期：2012-10-25 出版单位：焊接学报 年：2012 期：v.33 基金：国家自然科学基金项目(51075191);; 江苏高校优势学科建设工程资助项目 语种：中文; 页：HJXB201210007 页数：5 CN：10 ISSN：23-1178/TG 分类号：25-28+118

摘要

根据穿孔等离子弧焊特点,首先利用改进型三维锥体热源模型建立准稳态条件下的三维熔池模型;然后在频率15～100 kHz的范围内,对低活化马氏体钢(CLAM钢)穿孔等离子超声电弧焊接熔池模态进行分析,计算得到共14阶模态,分布于6个主要频率附近;最后分析了其中五阶模态的响应情况.结果表明,随频率增加,熔池局部的振动变形越来越剧烈,整体差异性增大.利用该方法可实现超声电弧焊接谐振频率的确定,文中也为超声电弧焊工艺优化提供了一定的参考,可缩短超声电弧工艺设计时间,降低研发费用.
        With considering the characteristics of keyhole plasma arc welding and using three-dimensional conical heat source model,a three-dimensional model of molten pool is established.Then,the mode modal analysis of molten pool for China Low Activation Martensitic(CLAM) steel is conducted within the frequency range of 15 kHz to 100 kHz.Finally,the six main resonance center-frequencies(14 modes) are obtained and the response corresponding to five modes are analyzed.The results show that with the increase of natural frequency the local vibration deformation of molten pool is more and more severe.We can use this method to determine the resonant frequency of ultrasound-arc welding.This paper also provides some reference for process parameters optimization of ultrasound-arc welding as well as shortens the R&D cycle and reduces the cost.

引文

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