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论文类型：期刊论文
发表时间：2022-06-30
发表刊物：振动工程学报
所属单位：建设工程学部
期号：6
页面范围：992-1002
ISSN号：1004-4523
摘要：Power spectrum density transmissibility (PSDT) is a kind of (complex) frequency domain function proposed in recent years, describes the relationship between power spectra of system responses, and is mainly used as a primary data of operational modal analysis (OMA). Different from traditional OMA techniques, PSDT-based methods are not influenced by colored components in excitations, and that makes it has broad development and application prospects. However, the concept and properties of PSDT have not been discussed carefully and deeply yet. In this paper, the relationships between PSDT and modal parameters and between PSDT and colored components in excitations are discussed base on a couple of system models. Influence factors of PSDT under different load conditions are discussed. The reason and advantage of why PSDT can be used as primary data of operational modal analysis are explored. Finally, the correctness of conclusions is validated through a simulation and an experimental examples. © 2016, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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