摘要
为研究损伤公路桥梁车桥耦合振动响应的非线性规律,文章采用延时矢量方差(delay vector variance,DVV)算法分析损伤桥梁车桥耦合的加速度响应,研究了车辆行驶速度、车辆质量、路面粗糙度及损伤程度对损伤桥梁振动加速度响应的非线性影响;通过简支梁数值模拟,对比分析1/4跨和跨中加速度响应的非线性大小变化。研究发现:随车速的增大,加速度响应的非线性呈现增大—减小—增大的规律;随车辆质量和路面粗糙度等级的增大,加速度响应的非线性增大,而损伤程度的变化对加速度响应的非线性影响较小。
To study the nonlinear regialarity of vehicle-bridge coupled vibration of the damaged highway bridge, the acceleration response of the vehicle-bridge coupled vibration of the damaged bridge is analyzed by using the delay vector variance（DW） method, and the effect of vehicle speed, vehicle weight, road surface roughness and damage degree on the nonlinearity degree of damaged bridge vibration acceleration response is studied. By the numerical simulation of simply supported beam, the changes of the nonlinearity of acceleration response of 1/4 span and midspan are compared and analyzed. The results show that with the increase of the vehicle speed, the nonlinearity of the acceleration response first increases, then decreases and then increases again. With the increase of the vehicle weight and the degree of road surface roughness, the nonlinearity of the accel- eration response increases. But the change of the damage degree has little effect on the nonlinearity of the ac- celeration response.
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2017年第10期1376-1381,1415,共7页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(51578370)
天津市科技支撑计划重点资助项目(16YFZCSF00460)
关键词
损伤桥梁
车桥耦合
延时矢量方差(DVV)
加速度
非线性
damaged bridge
vehicle-bridge coupling
delay vector variance（DVV）
acceleration
non- linearity
