高能管道压扁型约束件动态冲击试验与仿真分析

Dynamic impact test and simulation analysis of crush pipe restraint components used in high energy pipe

为评估高能管道断裂甩击下压扁钢管型约束件的动态性能,搭建气液联控式试验台模拟管道甩击过程,并利用ANSYS软件对该试验过程进行数值仿真,通过试验与仿真中的位移、速度和支反力时程曲线的对比分析,验证了数值仿真模型的可靠性。在此基础上,采用数值仿真方法研究约束件几何参数、冲击位置对其吸能特性及力学性能的影响规律。结果表明:在冲击过程中约束件的最大变形量、吸能量随直径增大而增大,随壁厚的增大而减小;支反力峰值、能量吸收速率随壁厚增大而增大,随直径增大而减小;冲击位置越靠近约束件两端变形量越大,支反力越小,能量吸收速率越慢。

To evaluate the dynamic performance of the crush pipe restraint component under the high energy pipeline fracture and whip,the gas-liquid combining control experimental platform is built to imitate the process of the pipeline whip and a numerical simulation of the experiment is conducted by applying the software Ansys.The reliability of numerical simulation model is proved by comparing and analyzing the displacement,speed and reaction force time-history curve in the experiment and the simulation.Based on the above,the geometric parameter,impact position's influential principle to restraint's energy-absorption features and mechanical function are studied by adopting the numerical simulation method.The result shows that maximum deformation and energy absorption of the restraint increase with the growth of the diameter and decrease with the growth of the wall thickness,that reaction force peak and energy absorption rate increase with the growth of the wall thickness and decrease with the growth of the diameter,and with the impact position close to ends of the restraint component,deformation increases while reaction force and the energy absorption rate decrease.