车辆载荷作用下大口径埋地钢管力学性状分析

为了研究大口径埋地钢管在车辆载荷作用下的力学特性,利用ANSYS有限元软件建立车辆-道路-管道耦合系统的三维有限元模型,模拟车辆在行驶过程中埋地管道位移和应力随时间变化的规律,定性分析车速、车辆轮压和车辆载荷作用位置等因素对管道力学性状的影响,并对比讨论了车辆载以静载荷和动载荷两种不同方式加载时对管道产生的不同影响。研究表明,管道位移和应力随着车速增加而减小,随着轮压增大而增大,因此应避免车辆低速超载的情况。该研究可为车辆载荷作用下埋地管道的设计与防护提供理论参考。

Mechanical Property Analysis of Large-diameter Buried Steel Pipeline under Vehicle Load

In order to study the mechanical properties of large-diameter buried steel pipeline under vehicle load,a three-dimensional finite element model of vehicle-road-pipeline coupling system is established by using the finite element software ANSYS. The variation law of displacement and stress of buried pipelines with time during the driving process of vehicle is simulated,the influences of vehicle speed,wheel pressure and loading position on the mechanical properties of pipeline are analyzed qualitatively,and the different influences of vehicle load on the pipeline under static load and dynamic load are compared and discussed. The study shows that the displacement and stress of pipeline decrease with the increase of vehicle speed,and increase with the increase of wheel pressure,so low speed and overload should be avoided. The study can provide a theoretical reference for the design and protection of buried pipelines under vehicle load.