空间桁架结构特征响应信息对模型修正的影响机理分析

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摘要实测的结构响应特征信息是有限元模型修正的基础。由于土木工程结构体型巨大和服役环境复杂，使得结构现场测试难度大、成本高和测试信息有限，因此，合理和高效地利用这些来之不易的有限测量信息，以最小的代价实现对有限元分析模型的有效修正，意义重大。从数学问题求解的角度分析结构模型修正，通过一个空间桁架的数值仿真，研究结构特征信息量大小和类型对模型修正的影响，揭示结构特征信息对模型修正的影响机理和规律。基于设计和建立的实验室空间桁架模型的标准实验和损伤实验，开展了基于实测数据的桁架结构模型修正，验证了结论的准确性和可靠性。对如何充分利用有限的结构特征信息对有限元模型进行高效和可靠的修正，提出了一些有价值的参考建议。

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	周林仁
	叶文许

关键词 ：空间桁架, 结构模型修正, 特征量信息, 灵敏度分析, 相关性分析

Abstract：The structural characteristic response information comes from the engineering field testing, are the foundation of the structural model updating. The engineering structure testing is difficulty to carry out, high cost and limited measuring information. Therefore, it is high necessary to make best use of this valuable and limited characteristic response information, and achieve a successful model updating with the least cost. In this paper, the structural model updating is treated and analyzed as solving a mathematical problem. The situations of different amount and type of characteristic response information for model updating are performed by numerical simulation based on a space truss. Based on the analysis results, some phenomenon and internal relations are found and explained. Also, an experimental space truss is designed and built to verify the reliability of the conclusion based on measured data. Some suggestions on how to make full use of the limited structural characteristic information for efficiently and reliably finite element model updating are provided.

Key words： space truss structural model updating characteristic response information sensitivity analysis correlation analysis

收稿日期: 2022-10-09 出版日期: 2023-09-15

引用本文:

周林仁,叶文许. 空间桁架结构特征响应信息对模型修正的影响机理分析[J]. 振动与冲击, 2023, 42(17): 1-8.
ZHOU Linren, YE Wenxu. Mechanism analysis for effects of characteristic response information of space truss structure on its model correcton. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(17): 1-8.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2023/V42/I17/1

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