中文摘要：

一个新方法被建议由同时检测本地损坏并且从几结构的动态回答识别支持刺激在未知支持刺激下面估计结构的条件。对结构起作用的支持刺激被直角的多项式近似建模，并且关于它的物理参数和直角的系数的结构的动态反应的敏感被导出。鉴定方程基于泰勒是第一顺序近似，并且在一个反复的过程与抑制最少平方的方法被解决。一十五故事砍造模型和五故事的三维的钢框架结构被学习验证建议方法。有吵闹的测量加速的数字模拟证明建议方法罐头精确地检测本地损坏并且从仅仅结构的几回答识别未知支持刺激。这个方法为检测结构的损坏并且与未知输入和不完全的测量产量信息更新模型提供一条新途径。

英文摘要：

A new method is proposed to assess the condition of structures under unknown support excitation by simultaneously detecting local damage and identifying the support excitation from several structural dynamic responses. The support excitation acting on a structure is modeled by orthogonal polynomial approximations, and the sensitivities of structural dynamic response with respect to its physical parameters and orthogonal coefficients are derived. The identification equation is based on Taylor＇s first order approximation, and is solved with the damped least-squares method in an iterative procedure. A fifteen-story shear building model and a five-story three-dimensional steel frame structure are studied to validate the proposed method. Numerical simulations with noisy measured accelerations show that the proposed method can accurately detect local damage and identify unknown support excitation from only several responses of the structure. This method provides a new approach for detecting structural damage and updating models with unknown input and incomplete measured output information.