基于Ansys Workbench的钢丝缠绕缸筒预应力仿真分析

Simulation Analysis of Cylinder Prestress of Steel Wire Winding Cylinder Based on Ansys Workbench

基于四柱液压机预应力钢丝缠绕缸筒的分布形式及初应力台阶层数特性,缸筒的支撑部位不但承受内压引起的恒定应力,还承受钢丝缠绕缸筒引起的交变应力,故而会产生渐进的塑性变形累积。通过理论计算公式求解相应参数,建立三维本构模型,借助Ansys workbench对其进行热固耦合仿真分析,并与理论计算结果对比,验证降温加载预应力缠绕油缸设计的合理性,结合400 MN的板片液压机的预应力钢丝缠绕缸筒的设计,设定油缸额定工作压力为88 MPa,内半径为850 mm,钢丝缠绕层数均分为10层、8层、6层、4层、2层初应力台阶进行仿真,综合分析仿真结果,得出最佳的钢丝缠绕初应力台阶层数,由此分析预紧系数对预应力钢丝缠绕缸筒设计参数的影响规律。

Based on distribution form of cylinder prestress wire winding cylinder of four-column hydraulic press and level characteristics of initial stress table, supporting parts of the cylinder not only bear the constant stress caused by internal pressure, but also bear the alternating stress of steel wire winding cylinder. In this way, gradual plastic deformation accumulation is produced. Through theoretical calculation, corresponding parameters are solved, three-dimensional constitutive model is established, thermosetting coupling simulation is analyzed through Ansys workbench. Through the comparison of theoretical calculation results, the rationality of the design of the cooling loading prestressed winding cylinder is verified. Through combining with the design of prestressed wire winding cylinder of 400 MN sheet bar hydraulic machine, the rated working pressure of oil cylinder is set as 88 MPa, and inside radius as 850 mm. The number of wire winding layers is divided into 10, 8, 6, 4, and 2 initial stress steps for simulation. Through comprehensive analysis of simulation results, the optimal steel wire winding cylinder of the initial stress steps for simulation is got. In this way, the influencing law of preload coefficient on design parameters of prestressed steel wire winding cylinder can be analyzed.