悬挂式个人快速捷运车辆转向架结构强度分析
杜子学吴辰思文孝霞
Structural Strength Analysis of Bogie for Suspended PRT Vehicles
DU ZixueWU ChensiWEN Xiaoxia
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作者信息:重庆交通大学机电与车辆工程学院， 400074， 重庆
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Affiliation:School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, 400074, Chongqing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.20230466
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中图分类号/CLCN:U260.331
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栏目/Col:车辆制造与列车控制
摘要:
［目的］悬挂式PRT（个人快速捷运）车辆是一种新型交通工具，转向架作为其核心部件之一，其结构强度直接影响车辆的安全运行，因此有必要对其结构强度进行分析。［方法］提出了一种新型悬挂式PRT车辆转向架，以其为研究对象进行受力分析，并构建受力拓扑构型图。基于悬挂式PRT的特殊运营场景和走行机理，重点分析了进弯、进弯制动、转弯、爬坡（坡度为26%）、车辆前轴右侧轮胎失效、车辆后轴左侧轮胎失效和满载静止等7种工况。通过建立动力学模型并分析受力传递路径，获得了各工况的载荷大小。构建了转向架构架的有限元模型，计算分析了各工况下的构架强度，并评估其设计强度是否符合要求。［结果及结论］形成了一套适用于悬挂式PRT车辆转向架的结构强度计算分析方法。计算结果表明，各工况下转向架的最大应力为301.9 MPa，出现在进弯工况下前右连接座与右侧主纵梁连接的焊缝处，小于材料的许用应力，符合强度设计要求。
Abstracts:
［Objective］ Suspended PRT (personal rapid transit) vehicles represent a new type of transportation, with bogie as one of its core components. The structural strength of the bogie directly impacts the operational safety of the vehicle, making it essential to conduct analysis on structural strength. ［Method］ A new type of suspended PRT vehicle bogie is proposed and taken as research object for force analysis, and a force topology configuration diagram is established. Considering the specific operational scenarios and running mechanisms of suspended PRT, seven operating conditions are analyzed in detail: entering a curve, braking while entering a curve, turning, climbing (with a gradient of 26%), vehicle front-axis right-front tire failure, vehicle back-axis left-rear tire failure, and full-load stationary condition. A dynamics model is developed to analyze the force transmission path, thereby determining the load magnitude for each working condition. A finite element model of the bogie frame is constructed to compute and analyze the structural strength under each working condition, and to assess whether the design strength meets the required standards. ［Result & Conclusion］ A comprehensive structural strength calculation and analysis method applicable to the bogie of suspended PRT vehicles is established. The calculation results indicate that the maximum stress on the bogie under all condition is 301.9 MPa, occurring at the weld joint bet-ween the front right connecting seat and the right main longitudinal beam during the curve entry condition. This value is below the allowable stress of the material, indicating compliance with strength design requirements.
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