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http://dx.doi.org/10.3744/SNAK.2018.55.1.37

Full Scale Measurement Data Analysis of Large Container Carrier with Hydroelastic Response, Part I - Identification of Modal Parameters  

Kim, Byounghoon (Department of Naval Architecture and Ocean Engineering, INHA University)
Choi, Byungki (Marine Structure Research Department, Hyundai Heavy Industries, Co., Ltd.)
Park, Junseok (Marine Structure Research Department, Hyundai Heavy Industries, Co., Ltd.)
Park, Sunggun (DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering, Co., Ltd.)
Ki, Hyeokgeun (DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering, Co., Ltd.)
Kim, Yooil (Department of Naval Architecture and Ocean Engineering, INHA University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.55, no.1, 2018 , pp. 37-44 More about this Journal
Abstract
To understand the dynamic characteristics of the vessel with hydroelastic response, it is very important to estimate the dynamic modal parameters such as mode shapes, natural frequency, and damping ratio. These dynamic modal parameters of full scale ship are a priori unknowns, hence to be estimated directly based upon the full scale measurement data. In this paper, dynamic modal parameters were extracted by signal processing of acceleration and strain data measured from a large container ship whose loading capacity is 9400TEU. The mode shapes of the vibrating hull were identified using the proper orthogonal decomposition and the vibration response of hull was decomposed into its modal magnitudes. Natural frequencies of specific modes were derived via Fourier transform of these modal magnitude. Also, the free decay signal of the vibrating hull was obtained through the random decrement technique and the damping ratio was estimated with accuracy.
Keywords
Hydroelasticity; Springing; Whipping; Dynamic modal parameter; Random decrement technique; Proper orthogonal decomposition;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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