高速铁路扣件弹条性能分析及频响特性研究
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摘要
为研究扣件弹条在高速列车运行下的性能及频响特性,以某型扣件SKL15弹条为研究对象,采用软件Solidworks和ABAQUS建立详细的扣件系统模型。首先分析弹条在自由状态下及组装下的模态,得到弹条同振型模态频率,分别是297 Hz、440 Hz、758 Hz、1 292 Hz和363 Hz、632 Hz、1 233 Hz、1 645 Hz。然后对扣件进行了不同扭矩下弹条性能参数分析实验,得到正常安装条件下弹条弹程和扣压力的关系。最后,为进一步分析弹条性能,在某高铁试验段进行了的轨道结构频响测试,得到弹条峰值频率约620 Hz,这与弹条组装模态所得频率632 Hz基本吻合,据此推断在该频率段扣件系统可能产生共振,引起扣件疲劳失效。
The performance and frequency response characteristics of the fastener clips in high-speed railway are analyzed. With the clips of fastener SKL15 as the object, the finite element model of the fastener system is established by means of Solidworks software and ABAQUS code. The modal frequencies of the fastener in the free state and assembling state are analyzed respectively, and the modal frequencies of the same mode are obtained, which are 297 Hz, 440 Hz, 758 Hz, 1 292 Hz and 363 Hz, 632 Hz, 1 233 Hz, 1 645 Hz for the two states. The performance parameters analysis of the fastener under different torques is also carried out. The relationship between the projectile range of the clip and the buckle pressure of the fastener under the normal installation conditions is obtained. In order to further analyze the performance of the fastener clips, the frequency response of the track structure is tested in a high-speed railway section. The peak frequency of the fastener is 620 Hz according to the test, which is close to the assembling modal frequency of 632 Hz. Thus, resonance of the fastener system may occur, which can cause the fatigue failure of the fastener.
The performance and frequency response characteristics of the fastener clips in high-speed railway are analyzed. With the clips of fastener SKL15 as the object, the finite element model of the fastener system is established by means of Solidworks software and ABAQUS code. The modal frequencies of the fastener in the free state and assembling state are analyzed respectively, and the modal frequencies of the same mode are obtained, which are 297 Hz, 440 Hz, 758 Hz, 1 292 Hz and 363 Hz, 632 Hz, 1 233 Hz, 1 645 Hz for the two states. The performance parameters analysis of the fastener under different torques is also carried out. The relationship between the projectile range of the clip and the buckle pressure of the fastener under the normal installation conditions is obtained. In order to further analyze the performance of the fastener clips, the frequency response of the track structure is tested in a high-speed railway section. The peak frequency of the fastener is 620 Hz according to the test, which is close to the assembling modal frequency of 632 Hz. Thus, resonance of the fastener system may occur, which can cause the fatigue failure of the fastener.
引文
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[2]罗曜波,伍曾,魏中臣,等.高速列车运行下WJ-7型扣件动力分析[J].土木建筑与环境工程程,2016(s2):60-63.
[3]肖宏,马春生,郭骁,等. e型扣件弹条断裂原因频谱分析[J].同济大学学报(自然科学版),2017,45(7):1000-1008.
[4]朱胜阳,蔡成标,尹镪,等.高速铁路扣件弹条动力学分析[J].工程力学,2013,30(6):254-258.
[5] PIORT S, KRZYSZTOFB. Preliminary numerical analysis of selected phenomena occurring a rail fastening system[J]. Powertrain and Transport, 2012, 19(4):607-614.
[6] LUO Y, LIU Y, YIN H P. Numerical inverstiga-tion of nonlinear properties of a rubber absor-ber in rail fastenings[J]. International Journal of Mechanical Science, 2013,69:107-113.
[7]许福东,徐小兵,易先中.机械振动学[M].北京:机械工业出版社,2015:98-106.
[8]杜继宏,王诗宓,窦日轩.控制工程基础[M]. 2版.北京:清华大学出版社,2014.
[9] PERIC D, OWEN D R J. Computational model for 3-D contact problems with friction based on the penalty method[J]. International Journal Numerical Method in Engineering, 1992, 35(6):1289-1309.
[10]王勖成.有限单元法[M].北京,清华大学出版社,2003:691-701.
[11]庄茁. ABAQUS非线性有限元分析与实例[M].北京:科学出版社,2005:312-330.
[12]庄茁,由小川,廖剑晖.基于ABAQUS的有限元分析与应用[M].北京:清华大学出版社,2009:287-350.
[13]肖俊恒,闫子权,涂英辉,等.轮轨振动对高铁扣件伤损的影响分析[J].中国铁路,2017(11):10-14.