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根据板壳和圆柱壳体理论 ,以及焊接收缩力模型 ,推出圆柱壳体类构件环缝焊接残余应力的计算公式 .用所导出的公式 ,对三峡水电站引水压力钢管环缝焊接残余应力作了计算 ,其计算结果与有关权威资料计算、测试结果吻合 .本计算结果为分析三峡引水压力钢管焊接残余应力的影响 ,以及焊接工艺设计 ,提供了理论参考 .
According to the theory of plate and shell, and the model of welding shrinkage force, the formula of girth welding residual stress for cylindrical shell components is deduced.The residual stress of girth welding of Three Gorges Hydropower Station is calculated by the derived formula , The calculated results are consistent with those calculated by authoritative data and the test results.The results of this calculation provide a theoretical reference for the analysis of the welding residual stress of the Three Gorges diversion pressure pipe and the welding process design.