作者：杨志超1, 朱萍玉1, 杨世峰2, 朱金2, 朱茂栋2
作者单位：1. 广州大学机械与电气工程学院, 广东 广州 510006;
2. 广州南方测绘仪器有限公司, 广东 广州 510665
关键词：W1型弹条;逆向工程;力学性能;仿真测试
摘要：
针对高速铁路用W1型弹条的力学性能,采用逆向工程及CAE技术,对W1型弹条处于静载荷下的力学性能进行仿真。首先由三坐标测量机获取W1型弹条三维数据,沿弹条路径方向由3点构建与路径方向垂直的截面圆,进而连接系列圆心获得弹条中心线,完成弹条的几何逆向建模;然后运用Ansys Workbench仿真测试多组螺栓预紧力工况下,W1型弹条的力学性能。得到如下结论:仿真测试得到最优螺栓预紧力为14 kN,此时扣压力10.2 kN,符合技术规范。该预紧力产生的最大应力为1313 MPa,小于弹条的屈服强度1600 MPa,且盈余量充足,有利于弹条长期稳定服役。但弹条的尾肢中部内侧为高应力集中区域,成为裂纹萌生扩展的敏感部位。
The mechanics performance simulation testing of W1 fastening clip in high speed railway
YANG Zhichao1, ZHU Pingyu1, YANG Shifeng2, ZHU Jin2, ZHU Maodong2
1. School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China;
2. Guangzhou Sowth Surveying & Mapping Instrument Co., Ltd., Guangzhou 510665, China
Abstract: Engineering and CAE simulation technology were employed to test the mechanical properties of W1 fastening clips for rapid transit railway under static loads. First, the three-dimensional data of W1 fastening clips were acquired with a three-coordinate measuring machine. That is, cross-section circles perpendicular to the path direction of the clip were created with three points along the path direction of the clip, and furthermore, the centers of these circles were connected to form center lines so as to finish the geometric reverse modeling of the clips. Second, the mechanical performance of W1 fastening clips under the working condition of multi-group bolt pretension were simulated and tested with Ansys Workbench. Conclusions are drawn below:According to simulation, the optimal bolt pretension is 14 kN while the fastening force is 10.2 kN, matching the technical specification. The maximum stress produced by the bolt pretension is 1313 MPa, smaller than the yield strength of the clip, which is 1600 MPa, and there are lots of margins, good for long-term stable working services. But the internal side on the central part of the end of the clip is a high stress area, a sensitive part likely to grow and expand cracks.
Keywords: W1 fastening clip;reverse engineering;mechanics performance;simulation testing
2016, 42(5): 131-134 收稿日期: 2015-09-24;收到修改稿日期: 2015-10-22
基金项目: 广东省应用型科技研发专项(2015B010129002);广州市重点实验室项目(2060402)
作者简介: 杨志超(1991-),男,广东广州市人,硕士研究生,专业方向为机械工程。
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