论文部分内容阅读
从分析局部预热产生的焊根间隙变化出发,研究了局部预热下刚性对接接头焊接拘束应力σ_w、附加拘束应力△σ_p的计算方法,讨论了局部预热温度、局部预热宽度的影响,推导了局部预热条件下△_p、σ_w的计算公式。采用国产低合金高强钢验证了公式的精确度。
Based on the analysis of the change of root clearance caused by local preheating, the calculation method of the restraining stress σ_w and the additional restraining stress △ σ_p of the rigid butt joint under local preheating was studied. The effects of the local preheating temperature and the local preheating width were discussed. The formulas of △ _p, σ_w under local preheating conditions are deduced. Using domestic low-alloy high-strength steel to verify the accuracy of the formula.