预压荷载、板下材质、螺栓扭矩和频率对扣件系统刚度特性影响研究
U213.5+31; 为研究我国高速铁路广泛使用的福斯罗W300扣件系统刚度特性,利用MTS-25伺服液压疲劳测试试验机,结合该扣件在线路上的实际服役状态,在不同预压荷载、板下材质、弹条螺栓扭矩和频率4种工况下,对此扣件系统整体动静刚度特性进行探究.结果表明:(1)随着预压荷载增加,扣件系统静刚度随之增加,30 kN预压荷载下静刚度比无预压荷载下增加了44.3％;(2)不同铁垫板的板下材质也会影响静刚度,尼龙材料对应的扣件系统静刚度值分别是热塑性材料和聚氨酯材料的1.61倍和1.78倍;(3)弹条螺栓扭矩松弛状态比标准状态的动刚度减小了27.3％,而弹条螺栓扭矩过拧状态比标准状态的动刚度增加了...
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| Published in | 铁道标准设计 Vol. 66; no. 9; pp. 69 - 73 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
上海工程技术大学城市轨道交通学院,上海 201620
01.09.2022
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1004-2954 |
| DOI | 10.13238/j.issn.1004-2954.202106040004 |
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| Abstract | U213.5+31; 为研究我国高速铁路广泛使用的福斯罗W300扣件系统刚度特性,利用MTS-25伺服液压疲劳测试试验机,结合该扣件在线路上的实际服役状态,在不同预压荷载、板下材质、弹条螺栓扭矩和频率4种工况下,对此扣件系统整体动静刚度特性进行探究.结果表明:(1)随着预压荷载增加,扣件系统静刚度随之增加,30 kN预压荷载下静刚度比无预压荷载下增加了44.3％;(2)不同铁垫板的板下材质也会影响静刚度,尼龙材料对应的扣件系统静刚度值分别是热塑性材料和聚氨酯材料的1.61倍和1.78倍;(3)弹条螺栓扭矩松弛状态比标准状态的动刚度减小了27.3％,而弹条螺栓扭矩过拧状态比标准状态的动刚度增加了5.0％;(4)扣件系统刚度的频变特性非常明显,在5～100 Hz范围内,80 Hz时扣件系统动刚度比5 Hz时增加了38％,超出了高速铁路扣件系统动刚度合理设计限值,直接影响扣件系统的弹性减振效果及轨道承轨台强度. |
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| AbstractList | U213.5+31; 为研究我国高速铁路广泛使用的福斯罗W300扣件系统刚度特性,利用MTS-25伺服液压疲劳测试试验机,结合该扣件在线路上的实际服役状态,在不同预压荷载、板下材质、弹条螺栓扭矩和频率4种工况下,对此扣件系统整体动静刚度特性进行探究.结果表明:(1)随着预压荷载增加,扣件系统静刚度随之增加,30 kN预压荷载下静刚度比无预压荷载下增加了44.3％;(2)不同铁垫板的板下材质也会影响静刚度,尼龙材料对应的扣件系统静刚度值分别是热塑性材料和聚氨酯材料的1.61倍和1.78倍;(3)弹条螺栓扭矩松弛状态比标准状态的动刚度减小了27.3％,而弹条螺栓扭矩过拧状态比标准状态的动刚度增加了5.0％;(4)扣件系统刚度的频变特性非常明显,在5～100 Hz范围内,80 Hz时扣件系统动刚度比5 Hz时增加了38％,超出了高速铁路扣件系统动刚度合理设计限值,直接影响扣件系统的弹性减振效果及轨道承轨台强度. |
| Author | 吴昊 高晓刚 王安斌 |
| AuthorAffiliation | 上海工程技术大学城市轨道交通学院,上海 201620 |
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| Author_FL | WANG Anbin WU Hao GAO Xiaogang |
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| Keywords | 螺栓扭矩 预压荷载 扣件系统 频变特性 高速铁路 动静刚度 板下材质 |
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