计算位移应力范围为何不考虑平均轴向应力? ASME B31.3中有话如下 Average axial stresses (over the pipe cross section)due to longitudinal forces caused by displacement strains are not normally considered in the determination of displacement stress range, since this stress is not significant in typical piping layouts. In special cases, however,consideration of average axial displacement stress is necessary. Examples include buried lines containing hot fluids, double wall pipes, and parallel lines with different operating temperatures, connected together at more than one point. 意思是,在确定位移应力范围时,通常不考虑位移应变引起的轴向力而产生的平均轴向应力,因为此应力在典型的管道布置中作用不明显。然而,在特殊情况下,平均轴向应力是有必要考虑的。比如,含热流体的埋地管线,双壁管道,处在不同操作温度下的多点连接的平行管道。 不大明白,此处通常不考虑平均轴向应力的解释。查看更多1个回答 . 3人已关注