基于双向流固耦合的液压立柱冲击特性分析

Analysis of impact characteristics of hydraulic column based on bidirectional fluid-structure coupling

立柱作为液压支架最重要的承载部件,其承载性能的优劣对液压支架整机的支撑效果有着巨大的影响,尤其当冲击地压灾害发生时,可能造成液压支架立柱弯曲、断裂和爆缸等事故发生。采用Solid Works联合Design Modeler软件建立ZF10000/25/38型液压支架立柱的流固耦合模型,将液压支架立柱等效视为弹簧,推导出单伸缩立柱等效刚度数学模型;使用ANSYS Workbench仿真软件对立柱流固耦合模型进行双向瞬态流固耦合仿真,采用三角波冲击载荷模拟冲击地压冲击特性,研究液压支架单伸缩立柱的抗冲击特性。结果表明:冲击载荷作用下液压支架立柱活塞杆最大应力为508 MPa,发生在顶端,缸体最大应力为254 MPa,发生在底部。

As the most important bearing component of the hydraulic support,the bearing performance of the column has a huge influence on the supporting effect of the whole hydraulic support.Especially,when the coal bump disaster occurs,it may cause accidents such as bending,fracture and cylinder explosion of the hydraulic support column.The fluid-structure interaction model of ZF10000/25/38 hydraulic support column is established by Solid Works and Design Modeler software.The hydraulic support column is regarded as a spring,and the equivalent stiffness mathematical model of single telescopic column is derived.Then,the bidirectional transient fluid-structure interaction model of column is simulated by ANSYS Workbench simulation software,and the impact characteristics of coal bump are simulated by introducing triangular wave impact load to study the anti-impact characteristics of the single telescopic column of the hydraulic support.The simulation results show that the maximum stress of hydraulic support column piston rod under impact load is 508 MPa,which occurs at the top,and the maximum stress of cylinder block is254 MPa,which occurs at the bottom.