摘要
针对跨坐式单轨车辆抗倾覆性能影响因素繁多且复杂的特点,利用降维思想提出一种综合评价车辆抗倾覆性能的方法,并分析其影响参数敏感性;基于浮心高度、柔性系数和临界侧滚角的定义,推导了针对跨坐式单轨车辆的3个指标计算方法,讨论了3个指标的区别,综合提出13个可量化的抗倾覆影响因子;基于测试和仿真数据建立了跨坐式单轨车辆的抗倾覆影响因子模型,计算得到5个主因子和各参数的影响权重;提出以抗倾系数来综合评价跨坐式单轨车辆的抗倾覆性能,并得到其便捷计算方法;利用多体动力学软件Universal Mechanism建立车辆-轨道参数化动力学模型,验证了所得到的参数权重与评价指标的准确性。分析结果表明:跨坐式单轨车辆的浮心高度、柔性系数和临界侧滚角均能不同程度地反映车辆抗倾覆性,但不能体现参数敏感性;跨坐式单轨车辆的抗倾覆性能受稳定轮与轨道梁表面接触状态的影响明显,当稳定轮一侧脱离轨面时,车辆的抗倾覆性能下降约50%;影响车辆抗倾覆性能的5个主因子分别是稳定轮、二系悬挂、横向跨距、一系悬挂和车体;适当降低稳定轮垂向位置和车体质心位置,增大水平轮预压力和走行轮横向跨距可有效提高跨坐式单轨车辆的抗倾覆性能。
Aiming at the characteristic that factors affecting the anti-overturning capacity of straddling monorail vehicle are numerous and complicated, a comprehensive evaluation method of vehicle anti-overturning capacity was proposed, and the sensitivities of influencing parameters were analysed based on the thought of dimensionality reduction. From the definitions of height of buoyancy center, flexibility coefficient and critical roll angle, the calculation methods for the three indexes of straddling monorail vehicle were deduced, and the differences of three indexes were discussed. Thirteen quantifiable anti-overturning factors were comprehensively proposed. Based on the test and simulation data, the anti-overturning factor model of straddling monorail vehicle was built, and the five main factors and influence weights of parameters were calculated. The anti-overturning coefficient was proposed to comprehensively evaluate the anti-overturning capacity of straddling monorail vehicle, and its convenient calculation method was obtained. The vehicle-track parameterized dynamics model was established based on the multibody dynamics software Universal Mechanism to verify the accuracies of parameter weights and evaluation indexes. Research result indicates that the height of buoyancy center, flexibility coefficient and critical roll angle of straddling monorail vehicle can reflect the anti-overturning capacity of vehicle to some extent, but they cannot reflect the parameter sensitivity. The contact state between the stabilizing wheel and the track beam surface significantly affects the anti-overturning capacity of straddling monorail vehicle. When one side of the stabilizing wheel departs from the track surface, the anti-overturning capacity of vehicle decreases by about 50%. The five main factors affecting the anti-overturning capacity of vehicle are the stabilizing wheel, the second suspension, the lateral span, the first suspension and the car body. Reducing the vertical position of stabilizing wheel and the centroid position of car body and increasing the pre-load of horizontal wheel and the lateral span of running wheel, can effectively improve the anti-overturning capacity of straddling monorail vehicle. 6 tabs, 9 figs, 30 refs.
作者
王超冉
季元进
任利惠(指导)
WANG Chao-ran;JI Yuan-jin;REN Li-hui(Institute of Rail Transit,Tongji University,Shanghai 201804,China)
出处
《交通运输工程学报》
EI
CSCD
北大核心
2020年第2期66-76,共11页
Journal of Traffic and Transportation Engineering
基金
“十二五”国家科技支撑计划项目(2015BAG19B02)。
关键词
车辆工程
抗倾覆性能
因子模型
跨坐式单轨
因子权重
抗倾系数
vehicle engineering
anti-overturning capacity
factor model
straddling monorail
factor weight
anti-overturning coefficient
