更高速下轮轨瞬态"滚-滑-跳"接触行为及中/短波不平顺临界限值研究

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中文摘要：简述轮轨滚动接触行为预测方法现状的基础上,选择最适于400 km/h及以上更高速和中/短波不平顺激励下轮轨"滚-滑-跳"接触行为分析的瞬态滚动接触显式有限元建模方法,建立更高速轮轨三维瞬态滚动接触时域分析模型,数值模拟了轮对在典型曲线轨道上的瞬态曲线通过行为.根据现营高速轮轨的中/短波不平顺调研,以波长30～210 mm钢轨波磨为典型不平顺,考虑波磨激励下左右两侧轮轨动力作用相互影响,分析波磨几何等因素对速度500 km/h及以下轮轨瞬态"滚-滑-跳"接触行为的影响.考虑低、中频动力减载等因素的前提下,仅从轮轨接触脱离角度,提出轮轨中/短波不平顺的临界管理限值建议,讨论其重要性、合理性和应用局限,并与《高速铁路钢轨打磨管理办法》规定的波磨整治限度进行对比.

外文标题：On Transient Wheel-Rail Rolling-Sliding-Jumping Contact and Critical Sizes of Short/Medium-wave Irregularities at Higher Speeds

外文摘要：A review of prediction methods for wheel-rail rolling contact was first presented.It is found that the 3-D tran-sient rolling contact model developed using the explicit finite element method seems to be the most suitable approach for analyses of transient wheel-rail rolling-sliding-jumping contact at 400 km/h,or at higher speeds,and in the presence of short/medium-wave irregularities.Therefore,a transient rolling contact model was developed to simulate the dynamic curving of a wheelset on a typical curved track in the time domain.Harmonic or ideal rail corrugation was taken as the typical short/medium-wave irregularity to study its influences on transient rolling-sliding-jumping contact,with a wave-length range of 30～210 mm considered on the basis of field observations of high-speed wheels and rails in operation.Be-sides corrugation geometry,corrugation occurring on the high and/or the low rails was also taken into account properly,with the speed up to 500 km/h.Considering dynamic unloading caused by dynamics of low and medium frequency,the critical sizes of short/medium-wave irregularities were determined,at which the wheel-rail contact loss just occurred.Fi-nally,proposals for management of wheel-rail short/medium-wave irregularities were discussed from the aspects of impor-tance,rationality and application limitations,and compared with the corrugation limit recommended for rail grinding opera-tions in Management Measures of High-speed Railway Rail Grinding.

外文关键词：

higher speed railwaywheel-rail rolling contactshort/medium-wave irregularitieswheel-rail contact losscritical sizesexplicit finite element method

作者：

赵鑫、黄双超、杨吉忠、Zhen YANG、温泽峰

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作者单位：

西南交通大学牵引动力国家重点实验室,四川成都 610031

中铁二院工程集团有限责任公司,四川成都 610031

Section of Railway Engineering,Delft University of Technology,Zuid-Holland Delft 2628CN

关键词：

更高速铁路轮轨滚动接触中/短波不平顺轮轨脱离临界限值显式有限元

基金：

国家自然科学基金四川省国际科技创新合作项目牵引动力国家重点实验室自主课题

项目编号：

520278072021YFH00062022TPL_T06

出版年：

2024

DOI：

10.3969/j.issn.1001-8360.2024.10.003

铁道学报

中国铁道学会

铁道学报

CSTPCD北大核心

影响因子：0.9

ISSN：1001-8360

年,卷(期)：2024.46(10)