航天器模态分析-试验体系工程实践研究
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Research on engineering practice of modal analysis-test of spacecraft
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    摘要:

    传统航天器结构模态试验通常会用来检验结构有限元分析模型,但往往是通过人工调整有限元模型参数来修正模型,分析与试验联系不紧密,影响后续分析结果的精度、研制周期和经费等.为改变航天器模态分析及试验现状,文中介绍了模态分析-试验体系工程研制流程在理论上的可行性,并以某缩比舱段为例,基于Virtualab-Nastran软件平台,完整实施模态分析-试验体系过程,包括预试验分析、模态试验、模型修正等过程,紧密联系模态分析、试验,并依据试验结果准确快速修正有限元模型,使分析结果与试验接近,实现精确建模.

    Abstract:

    Traditional modal test of spacecraft is usually used to examine its finite element model, but the parameters of the finite element model are always modified through artificial adjustment, which isolates modal analysis from modal test, and influences the precision of subsequent analysis, research period and funds etc. In order to change the present situation of modal analysis and test of spacecraft, this paper introduces the feasibility of modal analysis-test system in theory, and based on the Virtualab-Nastran software platform, gives an example of a scaling cabin, implements the complete procedures of modal analysis-test system, including pretest analysis, modal test, model updating etc, which closely relates modal analysis to test, corrects the finite element model rapidly according to the test results, makes the analysis results close to test results, and achieves precise modeling.

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郭其威,吴松,刘芳,赵阳东.航天器模态分析-试验体系工程实践研究[J].动力学与控制学报,2014,12(3):274~278; Guo Qiwei, Wu Song, Liu Fang, Zhao Yangdong. Research on engineering practice of modal analysis-test of spacecraft[J]. Journal of Dynamics and Control,2014,12(3):274-278.

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  • 在线发布日期: 2014-07-27
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