首页|轮轨激励对高速列车轴装制动盘热-机耦合疲劳分析

轮轨激励对高速列车轴装制动盘热-机耦合疲劳分析

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为研究轮轨激励对高速列车轴装制动盘热-机耦合疲劳影响,建立高速列车制动盘动力学模型和三维瞬态热-机耦合有限元模型,对紧急制动工况下轴装制动盘振动特性和热-机耦合特性进行计算分析.结果表明,高速列车制动盘在垂向上的振动加速度值最大,横向上最小,且振动形式以制动抖动为主,在0～100 Hz范围抖动最剧烈;与无轮轨激励工况相比,有轮轨激励的轴装制动盘表面温度升高得既快又高,在散热时,温度下降也更快;摩擦面总体呈现三个环状温度分布,在摩擦半径中心处制动盘表面温度比两侧温度高,在三个不同的摩擦半径上,温度呈现梯度分布;有、无轮轨激励工况下制动盘表面的疲劳损伤和疲劳寿命的分布云图与制动盘表面的温度场分布情况基本一致,且热应力越大制动盘表面的疲劳损伤越严重,疲劳寿命越短.
Thermal-mechanical Coupling Fatigue Analysis of High-speed Train Axle-mounted Brake Disc under Wheel-rail Excitation
A high-speed train brake disc dynamics model and a three-dimensional transient thermal mechanical finite element interaction model are developed to investigate dynamic effect of wheel vibration on the fatigue of the thermal-mechanical couplings of brake discs mounted on high-speed rails.The results show that the vibration acceleration value of the brake disc of high-speed train is the maximum in vertical direction and the minimum in transverse direction,and the vibration form is mainly brake jitter,and the jitter is the most severe in the range of 0-100 Hz;In comparison,the surface temperature of the brake disc attached to the shaft increases rapidly with the rail and decreases rapidly with temperature;The surface of the brake disc usually shows three hot circles;And the surface of the brake disc is located in the middle of the friction circle,the temperature is higher than the temperature on both sides,the temperature shows the gradient distribution of the three different friction differences.Brake disc surface fatigue damage and fatigue life distribution cloud diagram with and without wheel track tension basically corresponds to the distribution of the brake disc surface temperature field,the higher the thermal stress,the more serious the fatigue damage increase.The fatigue life of the brake disc surface is shortened.

wheel-rail excitationvibrationthermo-mechanical couplingbrake discthermal fatigue damage

朱海燕、黎洁、肖乾、陈道云

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华东交通大学轨道交通基础设施性能监测与保障国家重点实验室 南昌 330013

华东交通大学机电与车辆工程学院 南昌 330013

轮轨激励 振动 热机耦合 制动盘 热疲劳损伤

国家自然科学基金江西省自然科学基金面上项目江西省自然科学基金面上项目江西省自然科学基金面上重点项目轨道交通运载系统全国重点实验室开放基金江西省教育厅科技项目载运工具与装备教育部重点实验室自主课题

5216204520224BAB20404020202BABL21402820232ACB204022RVL2403GJJ210666KLCEZ2022-11

2024

10.3901/JME.2024.04.409

机械工程学报
中国机械工程学会

机械工程学报

CSTPCD北大核心
影响因子：1.362
ISSN：0577-6686
年,卷(期)：2024.60(4)
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