《高速列车受电弓结构及动力学参数优化设计》-毕业论文.doc

摘 要 发展高速铁路是铁路现代化建设的必然趋势。而高速列车主要采用电力牵引，高速列车必须在高速运行条件下可靠地从接触网上取得电能，否则将影响列车运行和电气驱动系统的性能。随着既有线的提速改造和高速客运专线的加快建设，弓网系统的问题日益彰显。 本文从提高受电弓的运动学和动力学性能以改善弓网关系，提高受流质量的角度出发，主要完成了以下内容： 建立了受电弓非线性数学模型，并把非线模型线性化，利用等效刚度对接触网特性进行模拟，从而建立了弓网耦合数学模型。 借鉴试验结果，获得实验室内受电弓弓头的归算质量、刚度和阻尼等参数。试验结果表明受电弓的框架归算质量和阻尼并不是常数，而是随着升弓高度的变化而变化的量值。通过对受电弓/接触网耦合振动模型的分析，用MATLAB语言编制了计算程序，对受电弓各个动态参数以接触力的不均匀系数作为目标分别进行了优化。结果表明，优化后接触力的波动变得更小。 关键词：受电弓；接触网；受流质量；动态参数；优化设计 Abstract High-speed railway is an inevitable trend of the railway modernization construction．And high-speed train mainly adopts electric traction．The pantograph must obtain electric power dependably, which can influence the train running and performance of electric drive system．The serious problem of pantograph-catenary system is obvious after the railway reconstruction for speed upgrading and the construction of high-speed dedicated passenger railway in China． From the aspects of changing the relationship of pantograph and catenary improving the current collecting performance，the following main aspects are discussed in thesis： The nonlinear mathematical model of the pantograph is taken into account，and by linearizing this model and simulating the characters of catenary with equivalent stiffness，the pantograph and catenary coupled model is gained． Through experiment the paper gains the numerical value of equivalent mass and damp and effect of the head of the pantograph and in addition it is proved the equivalent mass and damp of the frame of the pantograph are variable with the height of the pantograph．By analyzing that model and writing the program with MATLAB language，the parameters of the pantograph are optimized with the uneven contact force coefficients as the goal function．From the result it Can be seen that the fluctuation of the contact pressure becomes much smaller than before after optimization． Keywords: pantograph; catenary; qualities of collecting current; dynamic parameters; optimization methods  目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc