高阶单步实时动力子结构试验技术研究

结构联机试验可分为两类：拟静力及拟动力试验技术，它们都需要建立一套显式的逐步积分算法。国内外学者在这方面已经进行了许多的研究，取得了很好的成果。随着振动控制技术在结构工程上的应用，一些速度相关型的装置开始用于被控系统，它给原有的实时子结构试验带来了新问题。如何建立更好的高精度、无条件稳定的实时动力子结构试验算法日趋重要。本文在前人早期高阶单步逐步积分算法研究成果的基础上，提出了一种新的高阶单步实时动力子结构试验算法。数值模拟分析表明，新算法不仅是显式的，而且具有高精度、无算法阻尼、无超越现象等算法特点，均比目前所见到的已有算法优越。如果能实现实时子结构试验，就能同时控制位移和速度，则应用本文算法必将取得更好的试验结果。

The research of a high order single step method for real-time substructure testing

The on-line test of structure can be divided into two types: quasi-static test and pseudo dynamic test. Their common key is to build up a set of explicit algorithm. The domestic and international scholars have already obtained good research findings in this aspect. With the application of the vibration control technique to the structure engineering, some devices related to speed was used to controlled system. It brought some new problems to the original real-time substructure testing. Then it is important to establish a high accuracy and unconditional stability real-time substructure testing algorithm. Based on the original research findings of the high order single step integration algorithm, a new algorithm for the high order single step real-time substructure testing was put forward. The new algorithm is not only explicit, but also has no damping of algorithm and has not transcendental phenomenon.