摘要
为使两种不同轨距的货车顺利通过道岔,设计了1435 mm与1000 mm轨距三线套轨铁路道岔。基于多体动力学理论建立车辆-套轨铁路道岔的轮轨系统空间耦合动力学模型,计算分析货车侧向通过标准轨距铁路道岔及直向通过米轨铁路道岔时的动力学响应,并研究过岔速度对动力学响应的影响。结果表明:货车侧向过岔时,车体横向加速度最大值出现在连接部分,其他动力学评价指标最大值出现在辙叉区,且不同速度下动力学响应波动较大;货车直向过岔时,各动力学评价指标最大值均出现在辙叉区;货车以45~70 km/h侧向过岔时,轮轨力、脱轨系数存在较大波动;货车以95 km/h以上速度直向过岔时,动力学响应明显增大。为使货车在满足安全限值的条件下侧向通过标准轨距铁路道岔、直向通过米轨铁路道岔,侧向过岔速度不应高于65 km/h,直向过岔速度不应高于105 km/h。
In order to ensure the smoothness of two types of freight cars with different gauges passing through the turnout,a mixed gauge turnout of 1435 mm and 1000 mm gauge with three lines was designed.A spatial coupling dynamic model of the vehicle-mixed gauges turnout wheel-rail system was established based on the multi body dynamics theory.The dynamic response of freight cars passing through the standard gauge turnout laterally and the meter gauge turnout vertically was calculated and analyzed,and the influence of turnout passing speed on the dynamic response was studied.The results show that when the truck passes through the turnout laterally,the maximum lateral acceleration of the vehicle body appears in the connecting part,while the maximum values of other dynamic evaluation indicators appear in the frog area,and the dynamic response fluctuates greatly at different speeds.When the truck passes through the turnout in a straight direction,the maximum values of each dynamic evaluation index appear in the frog area.When the freight car passes through the turnout laterally at a speed of 45~70 km/h,there are significant fluctuations in wheel rail force and derailment coefficient.When the truck passes through the turnout directly at a speed of over 95 km/h,the dynamic response significantly increases.In order for the vehicle to pass through the standard gauge turnout and the meter gauge turnout in a lateral direction while meeting the safety limit,the lateral speed of passing through the turnout should not exceed 65 km/h,and the direct speed of passing through the turnout should not exceed 105 km/h.
作者
曹庆川
王建西
郭庆
王晓曼
CAO Qingchuan;WANG Jianxi;GUO Qing;WANG Xiaoman(State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Railway University,Shijiazhuang 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Railway University,Shijiazhuang 050043,China;Hebei Railway Fastening System Technology Innovation Center,Shijiazhuang 050043,China)
出处
《铁道建筑》
北大核心
2023年第6期38-43,共6页
Railway Engineering
基金
国家重点研发计划(2021YFB2601003)
河北省自然科学基金(E2020210092)
石家庄铁道大学研究生创新项目(YC2022009)。
关键词
重载铁路
道岔
动力学响应
数值模拟
过岔速度
标准轨距
米轨
heavy haul railway
turnout
dynamic response
numerical simulation
turnout crossing speed
standard gauge
meter gauge
