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本文根据近年来我们的研究工作介绍了复杂结构系统试验模态分析中四个重要方面:理论基础、试验技术、参数识别和数据可靠性与精度检验。并给出实际复杂结构系统试验模态分析的结果。重点放在提高和保证分析结果的可靠性与精度上,以适应复杂结构动态设计的需要,用于改进有限元数学模型或直接为模态综合法提供子结构模态参数。
Based on our research work in recent years, this paper introduces four important aspects in modal analysis of complex structural system tests: theoretical basis, experimental techniques, parameter identification and data reliability and accuracy testing. The results of experimental modal analysis of actual complicated structures are given. The emphasis is placed on improving and ensuring the reliability and accuracy of the analysis results so as to meet the needs of dynamic design of complex structures, improving the finite element mathematical model or directly providing modal parameters of substructures for the modal synthesis method.