一种高效的基于梁单元的钢芯铝绞线有限元建模方法

An efficient finite element modeling method of aluminum cable steel reinforced based on beam element

区别于传统的基于实体单元和基于杆单元的钢芯铝绞线的有限元建模方法,采用了一种高效的基于梁单元的钢芯铝绞线的有限元建模方法。相对于基于实体单元的钢芯铝绞线建模长度(200 mm)的局限,基于梁单元的钢芯铝绞线的有限元建模长度可以大倍数增长;相对于基于杆单元的钢芯铝绞线的有限元建模方法,基于梁单元的建模方法使得在建立较大的1∶1钢芯铝绞线有限元模型的同时使同步获得各根股线应力应变等力学参数成为可能。在Solidworks中建立了1 400 mm长的钢芯铝绞线的几何模型,将该几何模型导入ABAQUS软件中进行装配,继而采用梁单元对建立的钢芯铝绞线模型进行离散,考虑各股导线之间的接触,施加与疲劳试验机上钢芯铝绞线相同的边界条件,最后将模拟得到的结果与疲劳试验机上实验得到的结果进行对比,证实了本文采用的基于梁单元的钢芯铝绞线的有限元建模方法的准确性。

Different from the traditional finite element modeling methods based on solid element and bar element, this paper adopts an efficient finite element modeling method for aluminum cable steel reinforced(ACSR) based on beam element. Compared with the modeling length limit of 200 mm or so of ACSR based on solid element, the modeling length of ACSR based on beam element can be increased by a large multiple.Compared with the finite element modeling method of ACSR based on bar element, when the larger finite element model of ACSR of 1∶1 is established, the mechanical parameters of stress and strain of each strand can be obtained synchronously. In this paper, the geometric model of 1 400 mm ACSR is established in Solidworks, and then the geometric model is imported into ABAQUS for assembly. Then, the model is discretized by beam element. The same boundary conditions as ACSR on fatigue testing machine are applied considering the contact between the wires. Finally, the simulation results are compared with the experimental results on the fatigue testing machine, which confirms the accuracy of the finite element modeling method based on beam element.