部分输入未知条件下结构参数识别法研究

深入研究了输入信息测试不完备条件下的结构参数识别问题，从理论上论证了部分输入未知时动力复合反演问题补偿算法的实质，指出了全量补偿算法在严格意义上的适用条件，提出了更为简便的二阶段识别法，使部分输入未知条件下结构参数识别的理论进一步完善，并可为工程应用提供指导。数值算例验证了理论上的正确性。

Study on identification method for structural parameter with incomplete input information

The techniques for structure parameter identification with incomplete input information in time domain are studied, and the essence of the Compensation Method for solving such problems is analyzed theoretically. The reason of failure for parameter identification based on Compensation Method is indicated and the convergence criterion for least square iterative procedure is set up, which advances the theoretical study of multiple identification. A new more concise and accurate time domain identification method with incomplete measurements is proposed for inversion of load process and estimating structural parameters. The method consists of two steps and the key link is to categorize structural parameters into two groups in terms of the roles in the reaction to the known load. The proposed two stage method is free from the iteration procedure and the numerical studies show that the proposed approach can effectively identify the structural parameters from incomplete measurements.