Modal analysis of ship stern by numerical and experimental method

被引：0
|
作者：
Liu C.-Q. [1 ,2 ]
Che C.-D. [1 ,2 ]
Yan F. [1 ,2 ]
机构：
[1] State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai
[2] School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai
来源：
Che, Chi-Dong (churchdoor@sjtu.edu.cn) | 1600年 / China Ship Scientific Research Center卷 / 20期
关键词：
FEM; OMA; Ship navigation testing; Ship stern modes;
D O I：
10.3969/j.issn.1007-7294.2016.04.012
中图分类号：
学科分类号：
摘要：
To improve the accuracy in ship stern modal analysis, a 3D ship stern + ship hull frame simplified FE (finite element) model is put out and the stern mode of a full-revolving propulsion ship is calculated by using this FE model. The calculation results are compared with those of other two traditional simplified models (3D ship stern model and 3D ship stern + 1D beam model). The comparison indicates that the improved model and the two traditional models show no significant difference in local modal calculation while in terms of whole modal calculation the difference increases with the increase of frequency. To further validate the FE model, a ship navigation testing is carried out and the whole structural modes of ship stern are identified through OMA (operational modal analysis) method. The comparison between results of FEM (finite element method) and OMA shows that the relative errors of whole structural modes in base frequency are all small while those of the improved model are relatively smaller than those of the two traditional models in high frequency. © 2016, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：478 / 486
页数：8
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