Indexed by:期刊论文

Date of Publication:2022-06-30

Journal:振动工程学报

Affiliation of Author(s):建设工程学部

Issue:6

Page Number:992-1002

ISSN No.:1004-4523

Abstract: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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