组合圆管外层为铍管,内层为钨管,二者通过过盈配合形成.采用MARC软件对组合圆管激光束钎焊过程进行了数值模拟,得到组合圆管钎焊过程的应力场及焊接后的残余应力分布,进一步研究了过盈量对组合圆管焊接残余应力分布的影响,并采用X射线法对组合圆管外表面的焊接残余应力分布进行测试.焊接残余应力有限元计算值与实测值的变化趋势基本一致,验证了有限元模型.
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