高速列车设备舱裙板颤振与支架损伤机理研究

项目名称： 高速列车设备舱裙板颤振与支架损伤机理研究

项目编号： No.51205017

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 机械工程学科

项目作者： 王文静

作者单位： 北京交通大学

项目金额： 25万元

中文摘要： 高速列车车下吊装的封闭设备舱为一细长箱型结构，大型设备均安装在内，外部封盖薄壁裙板和底板，其结构损伤是高速列车运行重大安全隐患，设备舱壁板颤振是造成其部件损伤的最直接原因。本项目研究气动载荷、振动载荷与设备舱部件损伤的对应规律，基于等损伤理论，建立设备舱裙板的气动载荷谱、振动载荷谱以及支架的应力谱；将多体系统动力学、有限元分析和模态分析相结合，建立高速列车设备舱裙板三维壁板颤振气动弹性力学模型，确定设备舱裙板颤振发生的临界条件，揭示其颤振机理，提出避免裙板颤振或抑制裙板颤振的方法；研究设备舱支架的疲劳行为及损伤机理，建立其寿命预测方法，提出设备舱安全设计准则。本项目的开展对优化车下设备舱结构、提升车下设备舱承载结构设计水平、确保行车安全具有重要的工程意义和学术价值。

中文关键词： 设备舱；气动载荷；颤振；动应力；损伤

英文摘要： The equipment cabin which is installed under the high-speed train is a slender box-like structure.Equipment cabins in which large-scale equipments installed are enclosed by thin-walled apron plates and bottom plates. The key part damage of the equipment cabin brings potential hazard for high-speed train in service. And the flutter of equipment cabin panels is the most direct reason for structural damage. This project tries to find the relationship rules of aerodynamic loads, vibration loads and component damage of equipment cabins. Based on the equal damage theory, the aerodynamic load spectrum, vibration load spectrum for apron plates and the stress spectrum for the cabin frame are established. Combined with multi-body system dynamics, finite element theory and modal analysis, 3D flutter model of the cabin apron plate is created and the flutter critical condition is identified. With the flutter mechanism announcement the method to avoid or moderate the flutter is provided. Finally, the fatigue behavior and damage mechanism of the cabin frame is studied. The fatigue life forecast method and the safety design norm are put forward. The development of the project is helpful to optimize the equipment cabin and to improve the structural design level. And at the same time, it is important to ensure the high speed trai

英文关键词： Euipment cabin；Aerodynamic load；Flutter；Dynamic stress；Damage