实时子结构实验的研究进展

如果结构的非线性或不确定性仅集中于结构的某一部分,则可仅把这一部分取出来进行实验,其余部分采用数值模型予以模拟,这就是所谓的子结构实验技术。如果实验子结构的反力与加载速率有关,就必须采用实时加载的方式才能获得可靠的实验结果。由于试件性能的速度相关性和实验加载的实时性,使得实时子结构实验在逐步积分算法、实验系统的加载控制和实验系统累积误差等方面比拟动力实验更加复杂。本文介绍实时子结构实验的研究进展,并指出有待进一步研究的问题。

Development of Real-time Substructure Testing

In many structures,the unpredictable nonlinear behavior that provides the motivation for laboratory testing is localized.In these circumstances a far more economical test can be performed using the substructure approach.If the reaction force of the experimented substructure depends on loading rate,then the test should be carried out in real-time.The rate dependent behavior of a specimen and real-time loading make real-time substructure testing(RST) much more complicated than pseudo-dynamic testing.This paper reviews recent development of RST and points out the related issues worthy of further research.