杨飞,牛留斌,支洋,高亮

• 1:北京交通大学土木工程学院
• 2:中国铁道科学研究院集团有限公司基础设施检测研究所
• 3:中国国家铁路集团有限公司工电部

摘要(Abstract)：

为研究400 km/h高速铁路线路钢轨接头引起的轮轨动态响应规律，采用轮轨真实形状建立轮轨动力学模型，并引入凹型和凸型钢轨接头不平顺作为边界工况；采用某高铁线路联调联试期间钢轨接头不平顺及轮轨垂向力验证模型输出的正确性；仿真模拟2种接头宽度和不同低塌量条件下的轮轨垂向力时域、时频域分布特征，揭示凸型和凹型接头下轮轨垂向力随接头参数的变化特性。采用幂函数和非线性最小二乘方法拟合不同工况下轮轨垂向力最大值与低塌量之间的映射关系，由轮轨垂向力波形变化特征研判接头形状，并提出基于轮轨垂向力的钢轨接头评价方法。在钢轨接头满足高铁维修规则的要求下，凹型接头工况下轮轨垂向力的建议阈值为100 kN,而凸型接头工况下轮轨垂向力的建议阈值为140 kN,并给出400 km/h高铁线路上钢轨接头评价案例验证评价方法的可用性。研究成果可为钢轨接头高速冲击特性及状态评价提供科学支撑。

关键词(KeyWords)： 钢轨焊接接头;轮轨动力学模型;轮轨垂向力;轨道管理

Abstract:

Keywords:

基金项目(Foundation): 国铁集团重大课题(K2024T006);; 国家自然科学基金(U2468223)

作者(Author): 杨飞,牛留斌,支洋,高亮

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