结构有限元模型修正中的模态缩聚及扩展概述

General Review of Model Reduction and Model Expansion in Structural Model Updating

大型土木工程结构的健康监测与状态评估是当前土木工程学界的研究热点之一,损伤诊断是其中的一个关键问题,是建立结构预警体系的重要因素。因此,建立能准确模拟结构响应的有限元模型对识别结构损伤意义重大,其中模型修正技术是建立高精度有限元模型的关键。文章简要介绍了结构有限元模型修正中模态缩聚及扩展的基本原理及方法。

Structural Health Monitoring （SHM） and structural state assessment of civil infrastructure has be- come an active issue of research in recent civil engineering academic field. Damage diagnose is one of a criti- cal issue among that, and a vital factor about establishment of structural pre-warning system. Therefore, It is significant to damage detection by deve｜oping an accurate finite element model for structural response simulat- ing, of which model updating technique is the key factor. This thesis makes a brief introduction of basic theory, methods of model reduction and model expansion on structural model updating.