摘要
基于空间梁格模型,识别得到了梁桥上作用的移动荷载。依据MAC矩阵准则(模态置信准则),采用逐步积累法,对荷载识别中的测点进行了优化布置。数值仿真计算中,对一单箱三室连续箱梁桥上的车桥相互作用力进行了识别。结果表明,测点优化措施可提高识别的精度和效率,降低识别结果对车辆偏心距的敏感性。
Based on a spatial grillage model,the moving load on a girder bridge is identified. According to the modal assurance criterion (MAC) matrix,the sensor placements were optimized using the successive accumulation method. The numeric examples were carried out for vehicle-bridge interaction identification on a tri-cell continuous concrete girder. The simulation results show that the optimal sensor placement can help to improve the identification accuracy and efficiency and reduce the susceptibility of identified loads to the eccentricity.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2009年第2期218-222,共5页
Journal of Vibration,Measurement & Diagnosis
关键词
梁桥
移动荷载
测点优化
梁格法
MAC矩阵
girder bridge moving load optimal sensor placement grillage model modal assurance criterion matrix
