大跨径桥梁自振特性试验的环境随机激振法  

Self-Vibration Characteristic Test of Long-Span Bridges by Means of Environment Random Excitation

作　　者：唐怀平[1] 王凤勤[1] 

机构地区：[1]西南交通大学应用力学与工程系,四川成都610031

出　　处：《西南交通大学学报》2000年第2期126-128,共3页Journal of Southwest Jiaotong University

摘　　要：采用快速可靠的环境随机振动激振法 ,基于结构上各测点的脉动时域响应信号 ,应用ITD时域模态参数识别理论 ,分析大跨径桥梁实桥的结构固有模态并列举了工程应用实例。Structural self vibration characteristic test is one of the most important contents of long span bridge quality evaluation. In this paper, a quick and reliable method of environment random excitation is proposed for self vibration characteristic test. Based on the theory of IDT modal parameter identification in time domain, and using the impulse response signals acquired from each structural measuring point, the method is used to analyze the self characteristics of a long span bridge.

关 键 词：大跨径桥梁 环境随机激励 自振特性试验 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]