基于动应变的桥梁动态称重及其优化算法

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (4) : 116-120.

论文

基于动应变的桥梁动态称重及其优化算法

王宁波，任伟新，万华平

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Bridge Weigh-In-Motion and it’s Optimization Algorithm Based on Dynamic Strain

WANG Ningbo, REN Weixin, WAN Huaping

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文章历史 +

摘要

将桥梁视为“称”对车辆进行动态称重，是一种获取桥面移动车辆行驶速度、轴距、轴重等信息的新方法。本文以桥梁不同截面动应变响应为对象，采用“峰值法”识别车辆速度、轴距，引入最小二乘原理识别车辆各轴重，再结合梯度法对初始识别结果值进行局部优化，最后建立车-桥耦合振动模型模拟桥梁动应变，对桥梁动态称重及优化算法进行数值仿真。结果表明，对已经具备一定精度的动态称重初始结果值进行局部优化能进一步提高精度，满足工程应用要求。

Abstract

Using bridges as scales to weigh trucks in motion is a novel method of getting velocity, axle load and other truck information. Focusing on the dynamic strain of different sections of bridge, the peak algorithm and the least square method are employed to indentify running speed, wheelbase and indentify axle load, respectively. In addition, the gradient method was used to optimize the initial recognition results. The bridge-vehicle coupling vibration is modeled to simulate the dynamic strain responses and numerical analyses are also carried out to deal with the results. Obtained results turn out that the local optimization to initial recognition results which already have a certain precision can further improve the accuracy to meet the engineering requirement for precision.

导出引用

王宁波;任伟新;万华平. 基于动应变的桥梁动态称重及其优化算法[J]. 振动与冲击, 2013, 32(4): 116-120

WANG Ningbo;REN Weixin;WAN Huaping. Bridge Weigh-In-Motion and it’s Optimization Algorithm Based on Dynamic Strain[J]. Journal of Vibration and Shock, 2013, 32(4): 116-120