热力架空管道的位移计算

热力架空管道系统在石油化工和城市供热工程中得到广泛的应用，原先热力架空管道的计算没有考虑到位移的非线性因素，不能正确地反映管道和支座的实际受力情况，现结合热力架空管道和支座的受力情况，给出了力学的计算模型，对作用在热力架空管道的载荷进行了分析，结合有限元法和变弹簧系统迭代法，用有限元迭代计算管道的位移，计算结果表明，分析热力架空管道必须考虑位移的非线性因素，同时必须正确考虑支座摩擦力的影响。

Displacement Calculation of thermal overhead pipeline

Thermal overhead pipeline system is widely applicable for petrochemical and city heat supply engineering. As nonlinear factor of displacement is not taken into account in design of thermal overhead pipeline previously, actual stress condition of pipeline and support can't be reacted correctly. Now a mechanical model is given to show stress conditions of thermal overhead pipeline and support. Analyzes a load acted on thermal overhead pipeline and calculates pipeline's displacement using infinite element iteration method by means of combination with infinite element method and variable spring coefficient iteration method. Calculation result shows that nonlinear factor of displacement must be considered when analyzing thermal overhead pipeline and support's frictional force must be taken into account correctly at the same time.