管道热位移计算方法,有关资料中发表过的许多准确的方法一般由电子计算机来完成。笔算多数采用近似计算法,如一次、三次方、三次方扭转修正法等。虽然算法许多,但都存在着一定程度的不足之处。今将各近似法算得结果,列表进行比较,表1和表2所示。以扭转修正法作基准,可以看出,一次方法算得数值相差太大,而三次方法算得B点和C点数值上小下大,三次方法显然不符合实际,由直观图形便知,上部管段比较柔软,补偿数值应大;下部管段较刚硬, Pipeline thermal displacement calculation method, published in the data of many accurate methods are generally completed by the electronic computer. Most calculations using approximate calculation method, such as the first, third power, the third power law correction and so on. Although many algorithms, but there is a certain degree of inadequacies. The results of each approximation method, the list is compared, Table 1 and Table 2 shows. To reverse the revised method as a benchmark, we can see that a method of calculating the value difference is too large, and the three methods are calculated points B and C small small value, the third method is clearly not true, intuitive graphics will know that the upper section of the comparison Soft, the compensation value should be large; the lower section of the more rigid,