摘要:研究目的:为改善高铁受电弓的可靠性，对受电弓可靠度及可靠性灵敏度进行分析。在升弓状态下对 DSA200受电弓的最高工作平面进行有限元分析，得到危险点的应力响应;然后利用试验设计方法，获取危险 点应力和随机变量的仿真样本，结合神经网络方法，拟合得到两者的关系表达式，构建出可靠性极限状态函 数;最后结合随机摄动法、一次二阶矩法及矩阵微分法，得到受电弓可靠度和可靠性灵敏度。研究结论：1)载荷对受电弓可靠性影响远大于材料属性参数，且泊松比对受电弓可靠度影响大于弹性 模量和材料密度的影响；（2)在实际设计生产和制造过程中，要严格控制受电弓的载荷和材料参数，以保证受 电弓的强度可靠度及高铁的安全运行;（3)所述的受电弓可靠性求解方法精度较高，可用于高铁受电弓的可 靠性设计过程。

Abstract ： Research purposes ： In order to improve the reliability of pantographs of high speed train, the finite element analysis is made in the state of head - rising of DSA200 pantograph and the stress response of the dangerous point is received. The simulation samples of dangerous point stress value and random variable are generated with the methods of sampling and experimental design. Then， their relational expression is fitted and the reliability limit state function is built using the technology of BP neural network. Combined with random perturbation technique， first order second moment method and matrix differential method，the reliability and reliability sensitivity of pantograph are analyzed. Research conclusions ： (1) The influence of load on the pantograph reliability is much greater than that of material property，and the effect of Poissons ratio is greater than those of elastic modulus and density of the material. (2) The load and material parameters should be strictly controlled in the process of design and manufacturing，in order to make sure the strength reliability of the pantograph and the safety of the high - speed railway operation. (3 ) The method of reliability proposed in this paper has a high precision and can be applied to the design of pantograph.