论文部分内容阅读
基于振动台的实时子结构试验是重要的现代结构试验技术,能很好的对土-结相互作用、减震系统(比如TLD、TMD)等动力特性进行大尺寸试件试验研究。试验系统稳定性是实现子结构试验的关键,但复杂的振动台动力特性使其稳定性预测精度还难以满足试验要求。该文结合振动台系统综合建模和根轨迹技术发展了稳定性预测方法,通过试验验证了该方法的可行性。同时从相位和幅值影响两方面对比讨论了常用分析方法的局限性,并采用该方法就结构特性对稳定性的影响进行了分析。研究结果表明考虑振动台综合模型的方法能很好的预测子结构试验系统稳定性。
The real-time substructure test based on vibrating table is an important modern structural test technology, which can well test the large-scale specimen on the dynamic characteristics of soil-knot interaction and damping system (such as TLD and TMD). The stability of the test system is the key to the substructure test. However, the complex shaking table dynamic characteristics make it difficult to predict the stability of the test. In this paper, the method of stability prediction is developed with the integrated modeling of shale-shaking table system and root locus technology. The feasibility of this method is verified by experiments. At the same time, the limitations of common analytical methods are discussed in terms of the influence of phase and amplitude, and the influence of structural characteristics on the stability is analyzed by this method. The results show that the method of considering the comprehensive model of shaker can predict the stability of substructure test system well.