... marine transportation pressure sensor convolution integral motion-free test frequency response function pressure distribution diffraction test kashiwagi power spectrum density function asia government dynamometer fbg pressure sensor japan government diffraction problem response...

... pressure distribution wavelength panel method rankine panel method long wavelength marine transportation input point impulse response function experiment kashiwagi ord response function estimation pressure data unsteady pressure distribution experimental result diffraction...

... to judge the ship maneuverability in waves based only on the trials performed in calm sea. modular maneuvering model maneuvering motion marine transportation drift force yasukawa artificial intelligence ship kochin function cal kashiwagi steady force motion equation eut trajectory...

... the reduction of wave drift forces is not only on all bodies but also on the inner cylinder. And a binary-coded genetic algorithm (BCGA) developed by Tasrief and Kashiwagi (2013) has been adopted to minimize the wave drift force on the inner cylinder directly. He et al. (2017) calculated the wave drift forces...

... (Loukogeorgaki et al., 2014) into direct (e.g. Kashiwagi, 1998b; Namba and Ohkusu, 1999; Khabakhpasheva and Korobkin, 2002; Ohkusu and Namba, 2004; Andrianov and Hermans, 2006a; 2006b; Eatock Taylor, 2007; Kim et al., 2007) and mode superposition methods. In the latter methods, the generalized (flexible) modes...

... cylinder coordinate system central body optimization velocity potential amplitude motion equation artificial intelligence kashiwagi incident wave renewable energy l-th body inner central cylinder outer cylinder wave drift force diffraction problem central cylinder ocean energy...

.... analytical solution plate displacement vertical elastic plate equation hydroelastic problem coefficient time evolution time-dependent hydroelastic response boundary condition mode-expansion method hydroelastic response meylan kashiwagi free surface elevation evolution elevation velocity...

... scattered-wave energy vertical circular cylinder coordinate system computation reservoir characterization cylinder artificial intelligence wave elevation outer cylinder wave drift force experiment amplitude computed result wave pattern incident wave kashiwagi inner cylinder circular...

... range of incident-wave frequencies are calculated and analyzed. Finally, the corresponding unsteady wave patterns around the hulls are illustrated and discussed. hull-form effect iterative time-marching scheme exciting force ship hydrodynamic hull form panel method kashiwagi engineering...

.... Different approaches for prediction are developed: The strip method including near-field and far-field method; the Rankine panel method; the Cartesian grid method and the enhanced unified theory. Kashiwagi (1995) studied the enhanced unified theory (EUT) and a modified Maruo s formula was used to calculate...

...Numerical Confirmation of Cloaking Phenomenon on an Array of Floating Bodies and Reduction of Wave Drift Force Takahito Iida, Masashi Kashiwagi and Guanghua He Department of Naval Architecture and Ocean Engineering, Osaka University, Osaka, Japan ABSTRACT When multiple floating bodies are situated...

..., Kyushu University, is introduced and employed in this study. This numerical method will be called the "CIP-based Cartesian grid method" in the present paper from now on. cartesian grid method ship motion interface kashiwagi heave oscillation test free surface numerical result computation...

... waves seem to be still unclear, because most comparisons have been made between the total increase in the ship resistance measured by a dynamometer in waves and the calculated value with a simplified potential-flow theory (e.g. Kashiwagi et al., 2010). Ohkusu (1980) proposed a method for measuring ship...

... wave modes such as surface wave mode (S-mode) and internal wave mode (I-mode) are obtained. frequency domain wave mode equation internal wave heave rao interaction boundary integral equation radiation rao density ratio interface two-layer fluid kashiwagi two-domain boundary element...

... considerable attention by many authors (e.g. Wu et al . (1995), Kashiwagi (2001), Meylan (2002), Sturova (2006) to name a few). A thin floating plate is one of the most well studied hydroelastic problems, because it models many physical applications, such as a VLFS (Very Large Floating Structure) to be used...

...Effects of Forward Speed of a Ship on Added Resistance in Waves Masashi Kashiwagi, Takehiro Ikeda and Takuma Sasagawa Department of Naval Architecture & Ocean Engineering, Osaka University Suita, Osaka, Japan ABSTRACT Despite a large amount of work so far, it is said that the predic- tion accuracy...

... is installed on the deck. thinc scheme hyperbolic tangent function cip cartesian grid method experiment calculation computation container ship model equation interaction wave-ship interaction kashiwagi free surface marine transportation particle nonlinear wave-body interaction...

... amplitude viscous effect oscillation test computed result sidewall coefficient heave added-mass higher frequency kashiwagi vortex shedding bem frequency wave channel unnatural variation experiment variation amplitude equation upstream oil & gas gap equal Consideration on 3-D...

... the seakeeping of multi hull ships traveling with forward speed. Kashiwagi (1993a, 1993b, 1993c) has also applied the unified theory to predict radiation and diffraction forces and wave induced motions for a catamaran advancing in waves. Although this unified theory method has shown a sizeable improvement over...

... In this paper, Maruo's formulas of wave drift forces acting on a freely floating body in waves are derived without the momentum theory. Firstly a method to estimate the surface integral of freely floating body is proposed. Then Kashiwagi's 1st and 2nd reciprocity, that is the energy conservation...