【摘要】 将轮轨力预估格式的迭代求解方法与子集模拟法相结合,给出了一种考虑轨道不平顺随机性的车轨耦合系统动力可靠度求解方法,从提高确定性响应求解效率和减少确定性响应求解次数两方面,提高了系统可靠度求解效率.算例以CRH2新造动车组为研究对象,获得车辆在直线轨道上的横向平稳性指标和曲线通过时的车轮脱轨系数分别超出各自限度值的失效概率.通过与直接Monte Carlo模拟(DMCS)对比,验证了所给方法的计算精度和效率.同时研究了不同波长范围内的随机轨道不平顺对车辆系统动力可靠度的影响,获得了与已有研究文献较为一致的规律,进一步验证了方法的正确性.更多还原

【Abstract】 A solution method for dynamic reliability of vehicle-track coupled systems considering the randomness of track irregularities is presented by combining the wheel-rail force prediction based iterative solution technique with the subset simulation(SS) method. The solution efficiency of system reliability has been improved by improving the solution efficiency and reducing the number of solutions of deterministic responses. Taking a CRH2 new vehicle as an example, the failure probabilities of the lateral ride quality index on the tangent track and the wheel derailment coefficient during curve negotiation exceeding limits are calculated, respectively. The calculation accuracy and the efficiency of the presented method are verified by comparison with the direct Monte Carlo simulation(DMCS). The influence of random track irregularities in different wavelength ranges on the dynamic reliability of vehicle system is also analyzed, and the results are in good agreement with the existing research literatures, which further verifies the correctness of the presented method.更多还原