大跨度斜拉桥拉索多相介质耦合非线性振动控制理论与方法

项目名称： 大跨度斜拉桥拉索多相介质耦合非线性振动控制理论与方法

项目编号： No.51208156

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 刘敏

作者单位： 哈尔滨工业大学

项目金额： 25万元

中文摘要： 本项目研究大跨度斜拉桥拉索涡激振动、风雨激振等多相介质耦合非线性振动的控制理论与方法。首先利用非线性系统的微分几何控制理论，研究斜拉索涡激振动、风雨激振等复杂非线性振动控制的解耦方法、分散线性化方法、分散控制器设计方法与分散状态变换的逆变换方法，发展斜拉索复杂非线性振动的分散线性化控制理论与方法；研究受控斜拉索复杂非线性振动的振动特性、气动力特性和减振效果，分析涡激振动临界风速、锁定区变化规律和风雨激振的临界条件、水线振动特性，给出斜拉索气动失稳临界条件；研究斜拉索多相介质耦合复杂非线性振动半主动控制的负刚度特征，考虑磁流变液阻尼器正、负刚度特征以及其与斜拉索的耦合作用，建立斜拉索多相介质耦合复杂非线性振动智能控制的设计方法。本项目研究成果，将形成斜拉索复杂风致非线性振动控制的理论、方法、控制算法及其控制系统设计方法，为大跨度桥梁斜拉索减振提供先进有效的方法，具有重要的理论意义和实用价值。

中文关键词： 斜拉桥拉索；涡激振动；风雨振；耦合；振动控制

英文摘要： The objective of the proposed study is to develop an effective vibration control methodology and theory, control algorithm and design method of intelligent control system for multi-phase coupling nonlinear vibration of stay cables in cable-stayed bridge with long-span. On the basis of differential geometry theory for nonlinear vibration system, some decentralized linearized control theories for vortex vibration and rain-wind induced vibration of stay cables will be proposed, such as decouping method, decentralized lineaized method, designed method on decentralized controller and inverse transformation method of decentralized states. Dynamic performance, control efficiency and aero-dynamic force are numerically and experimentally investigated on the complex nonlinear vibration of the controlled stay cables. Based on the numerical and experimental investigation, critical wind speed and locked region for vortex vibration are analyzed. For rain-wind induced vibration of the controlled stay cable, critical conditions and dynamic poperties of rivulet on stay cable surface are studied, and critical conditions for aero-unstable for controlled stay cable are developed. For the purpose of mitigation vibration of vortex and rain-wind induced vibration of the stay cable, intelligent vibration control system based on the mag

英文关键词： stay cable；vortex-induced vibration；wind rain-induced；coupling；vibration control