论文部分内容阅读
埋地长输管道运行中将受到多种载荷的作用,如土壤的主动和被动压力,以及地上的活载荷等。这些涉及到管道强度的问题,在设计时就要通过一系列计算加以解决。作为计算埋地管道变形和强度的重要基础,给出了弹性地基梁的挠曲线微分方程(位移方程)。通过假设的两段钢质管道,利用给出的该挠曲线微分方程分别进行了一端约束和两端约束的计算。结果表明,设定的计算误差均小于0.001,较为精确。同时,该微分方程还可用于埋地管道的弯矩、剪力和应力的计算。
Buried long-distance pipelines will be operated under various loads, such as active and passive pressure of the soil, and live loads on the ground. These relate to the problem of pipeline strength and must be resolved through a series of calculations at design time. As an important basis for calculating the deformation and strength of buried pipelines, the deflection curve differential equation (displacement equation) of the elastic foundation beam is given. Using the hypothetical two-stage steel pipeline, the one-end constraint and the two-end constraint were calculated by using the given differential equation of the deflection curve. The results show that the set calculation errors are all less than 0.001 and are more accurate. At the same time, the differential equation can also be used for the calculation of bending moments, shear forces and stresses in buried pipelines.