1. 辽宁铁道职业技术学院
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衣美玲. 高速铁路轮轨匹配特性分析[J]. 机械强度, 2022,44(5):1266-1270.
YI MeiLing. ANALYSIS ON WHEEL-RAIL MATCHING CHARASTERISTICS OF HIGH-SPEED RAILWAY[J]. 2022,44(5):1266-1270.
衣美玲. 高速铁路轮轨匹配特性分析[J]. 机械强度, 2022,44(5):1266-1270. DOI: 10.16579/j.issn.1001.9669.2022.05.037.
YI MeiLing. ANALYSIS ON WHEEL-RAIL MATCHING CHARASTERISTICS OF HIGH-SPEED RAILWAY[J]. 2022,44(5):1266-1270. DOI: 10.16579/j.issn.1001.9669.2022.05.037.
为改善高铁动车组因车轮踏面中央凹形磨耗恶化的轮轨关系,对比分析了高速铁路各型车轮踏面的轮轨匹配特性。凹形磨耗车轮因丧失重力刚度恢复力反馈响应,导致轮轨蠕滑增大,不良接触愈演愈烈。对比LMA、S1002G和XP55及典型凹形磨耗型面的匹配关系发现,型面选配需合理匹配转向架悬挂特性。LMA大接触斑和轨顶中心的接触位置易于形成共形接触,不利于延缓凹形磨耗;S1002G等效锥度及接触点位置在更窄的轨道窗口内非线性变化,不利于磨耗均匀发展,踏面名义位置处接触斑面积的峰值特征易形成集中磨耗;XP55保持锥度、接触斑面积的(近)线性变化,靠近钢轨工作边轨距角7 mm的初始钢轨接触位置利于克服轨顶共形接触。可借鉴XP55理念优化高速轮轨匹配关系。
To improve the wheel-rail relationship of high-speed EMUs due to the deterioration of wheel treads central hollow wear, wheel-rail matching characteristics of various treads were analyzed. Due to the loss of gravity stiffness restoring force, the wheel/rail creep increases and the bad contact becomes more and more severe. The matching relations of LMA, S1002 G, XP55 and typical hollow-worn profile were compared. It was found that the selection of profile should reasonably match the suspension characteristics of bogies. The larger contact spot area of LMA and the rail contact point close to the rail top is easier to form the conformal contact, which is not conducive to the delay of hollow-worn. The equivalent conicity of S1002 G and the position of the contact points change nonlinearly in the narrower scope, which is harmful to uniform wear; the peak of the contact spot area at the nominal rolling circle position of the wheel tread is easy to form the concentrated abrasion. XP55 maintains a(near) linear change in the equivalent conicity and contact spot area, and the initial rail contact position close to the rail gauge corner of 7 mm is benefit to overcome the conformal contact on the rail top. XP55 can be used for reference to optimize high-speed wheel-rail matching relationship.
轮轨匹配高速铁路凹形磨耗车轮等效锥度滚径差轮轨接触
Wheel-rail matchingHigh-speed railwayHollow-worn wheelEquivalent conicityRoll radii differenceWheel-rail contact
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