传感器布置及结构损伤识别的优化方法

假设测试噪音空间非均匀分布的情况,研究了传感器最优布置问题,提出了针对结构损伤识别的传感器最优布置方法。基于结构损伤演化过程的物理特征,将结构损伤识别问题等价为一个优化问题进行求解,通过采用同步优化策略,避免了结构动力特征方程的求解和动力参数灵敏度的计算。算例分析表明,根据传感器布置方案获得的测试数据以及同步优化模式,能够准确高效地得到存在噪音下的结构损伤位置和损伤程度等损伤识别结果。

Optimization Method for Sensor Placement and Structural Damage Detection

Problem of optimal sensor placement with non-uniform distribution of sensor noise was studied.An approach of optimal sensor placement for structural damage detection was proposed.Structural damage detection was formulated as an optimization problem based on evolution of structural damage.Strategy of simultaneous analysis and design was used to solve the equivalent optimization problem.The expensive computational cost on dynamic characteristic equation and sensitivities of dynamic parameters can be avoided.From the analysis of an example,based on measured data from optimal sensor configuration,the accurate results including location and severity of structural damages under noisy test data can be obtained efficiently by simultaneous analysis and design formulation.