郭珺, 唐贞云, 陈适才, 李易, 李振宝. 试件-加载系统相互作用对实时子结构试验系统稳定性影响[J]. 工程力学, 2016, 33(11): 59-67. DOI: 10.6052/j.issn.1000-4750.2016.01.0012
引用本文: 郭珺, 唐贞云, 陈适才, 李易, 李振宝. 试件-加载系统相互作用对实时子结构试验系统稳定性影响[J]. 工程力学, 2016, 33(11): 59-67. DOI: 10.6052/j.issn.1000-4750.2016.01.0012
GUO Jun, TANG Zhen-yun, CHEN Shi-cai, LI Yi, LI Zhen-bao. THE INFLUENCE OF SPECIMEN-TRANSFER-SYSTEM INTERACTION ON THE STABILITY OF REAL-TIME SUBSTRUCTURING SYSTEM[J]. Engineering Mechanics, 2016, 33(11): 59-67. DOI: 10.6052/j.issn.1000-4750.2016.01.0012
Citation: GUO Jun, TANG Zhen-yun, CHEN Shi-cai, LI Yi, LI Zhen-bao. THE INFLUENCE OF SPECIMEN-TRANSFER-SYSTEM INTERACTION ON THE STABILITY OF REAL-TIME SUBSTRUCTURING SYSTEM[J]. Engineering Mechanics, 2016, 33(11): 59-67. DOI: 10.6052/j.issn.1000-4750.2016.01.0012

试件-加载系统相互作用对实时子结构试验系统稳定性影响

THE INFLUENCE OF SPECIMEN-TRANSFER-SYSTEM INTERACTION ON THE STABILITY OF REAL-TIME SUBSTRUCTURING SYSTEM

  • 摘要: 实时子结构试验将易于建模部分进行数值仿真,剩余部分进行物理试验,从而间接增强了既有设备的试验能力。加载系统与试验试件动力特性的耦合是影响子结构系统稳定性的关键问题。现有稳定性分析方法忽略了其耦合效应对稳定性分析精度的影响。该文建立了作动器、振动台与物理试件间的动力耦合模型,建立了可考虑耦合动力特性的稳定性分析方法,通过试验与理论分析验证了该方法的准确性。基于该方法分别讨论了试件-加载系统相互作用对基于作动器和振动台的子结构试验系统稳定性影响。分析结果表明:试件-加载系统相互作用在不同条件对子结构试验系统稳定性会不同程度的降低或提高,需要特别考虑。

     

    Abstract: In Real-Time Dynamic Substructure (RTDS) testing, the easily modeled part is simulated numerically and the rest part is tested physically, so that the capacity of the existing facilities can be enhanced indirectly. The stability caused by the dynamics of transfer system and specimens are the challenge for the implication of RTDS testing. In previous research, the coupling dynamics of transfer system and specimens were neglected. In this paper, a dynamic coupling model was established for actuator and shaking table respectively. To consider the transfer-system-specimen interaction in the analysis of RTDS stability, a novel analysis method was developed and verified through analytical and experimental comparison. Using the developed method, the influence of transfer-system-specimen interaction on the stability of actuator and shaking table RTDS was discussed. The analysis results show that the transfer-system-specimen interaction is sometimes beneficial and sometimes detrimental to RTDS stability.

     

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