The Contrast Experimental Study on Operational Modal Analysis of Ship Structural Model
A ship is a large and multifunctional marine structure operating on the sea.In practice, the environmental noise on a ship has many complicated components and they influence the vibration of the ship structure.Besides the stochastic excitations such as waves and winds, there are also propeller-and host-induced harmonic excitations.In this paper, NExT/ERA algorithm program and a ship model have been made to realize the modal parameters identification of ship structure in the presence of both white noise and harmonic excitations.Moreover, whether the signal filtering technology has a great effect on the results of modal analysis is discussed.In order to study and analyze the influence of the harmonic excitations, experiments under different signal-to-noise ratio (SNR) conditions have been carried out.This has a guiding significance to the engineering practice.
Ambient excitation Modal parameters identification NExT ERA Filtering SNR
Jun Chen Xu Ming Hong Hong Yu Cui
School of Naval Architecture and Ocean Engineering,Faculty of Vehicle Engineering and Mechanics,State Key Laboratory of Structural Analysis for Industrial Equipment,Dalian University of Technology,Dalian 116024,P.R.China
国际会议
上海
英文
241-246
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）