论文部分内容阅读
由杨绍普博士主持的“高速机车运行稳定性与分叉”研究课题获铁道部科技发展基金资助。客运安全高速是铁道部“八五”科技攻关项目,机车运行的稳定性与否是能否保证安全的关键。目前,有关机车运行稳定性的研究主要采用线性或等效性化方法。鉴于复杂的轮轨几何关系、蠕滑、干摩擦饱和、非线性悬挂特性等因素,机车是一个高度非线性系统。用常规的研究方法精度既低,又掩盖了非线性系统的本质现象。本课题将用分叉理论研究运行稳定性问题,揭示蛇行失稳的机理,找出提高临界速度的途径,这在国内尚属首次。
The research topic “Stability and Bifurcation of High-speed Locomotive Operation” moderated by Dr. Yang Shaopu was funded by Science and Technology Development Fund of Ministry of Railways. High-speed passenger safety is the Ministry of Railways “Eighth Five-Year” scientific and technological projects, whether the stability of locomotive operation is the key to ensure safety. At present, the research on locomotive running stability mainly adopts linear or equivalent method. The locomotive is a highly nonlinear system due to the complex geometry of the wheel and rail, creep, dry-friction saturation and nonlinear suspension characteristics. With conventional methods, the precision is low and the essence of nonlinear systems is masked. This topic will use the bifurcation theory to study the problem of operational stability, reveal the mechanism of snake instability, find ways to improve the critical speed, which is the first time in China.