沉管隧道健康监测试验中传感器位置的优选

OPTIMIZATION OF SENSOR POSITIONS IN A TEST FOR IMMERSED TUNNEL HEALTH MONITORING

基于单节沉管隧道缩比模型在地震激励作用下的健康监测试验,借助商业有限元软件ANSYS对单节隧道缩比模型进行等代地震荷载下的平面应变分析和整体模态分析,得到传感器优化布置初选点。再利用遗传算法对初选点进行优化排序,得到传感器优化布置的最终方案。该方法与EFI法传感器优化布置结果吻合较好。该方法对于大型结构的传感器优化布局有一定的借鉴作用。

Based on a health monitoring test for a similar immersed tunnel model of single section with seismic input,resorting to the tool of commercial FEA software ANSYS,the authors perform this model's plane strain analysis and overall modal analysis with equivalent seismic load and get the primary selection for sensor placement.Then,using the genetic algorithm,an optimal sensor placement is worked out.The result is almost the same as optimal sensor placement from the EFI method.The optimal approach proposed is helpful to optimal sensor placement of large structures.