Abstract The seakeeping performances in oblique wave conditions, such as ship motions and unsteady pressures on a hull, are getting more important, recently. These physical quantities used for estimating loads induced by waves evaluating the safety of ship. Thanks to evaluation various incident angles, rational design with sufficient less construction cost can be realized. Therefore, estimation...

We evaluated the reliability of static and dynamic lumbar muscle endurance measurements on a BackUP lumbar extension dynamometer. Sixteen healthy participants (8 male; 8 female) volunteered for this investigation. Fifty percent of each participant's body weight was calculated to determine the weight load utilized for the static (holding time) and dynamic (repetitions) lumbar extension endurance...

Abstract A velocity vector profile technique based on an ultrasound pulsed Doppler method can enrich the information flow field. However, it has shown low availability because a new design of special transducers is required for each measurement case. This study proposes profiling vectors using conventional that are widely supplied to users. We constructed configuration minimize uncertainty dete...

The wake waves generated by the steady movement of a planing hull are analyzed means towing tank tests. Two sets waves, including divergent and transverse identified then analyzed. wave period is seen to decrease increase in speed vessel. These damp temporally. mechanisms that lead damping were found depend on orbital Reynolds number semi-planing regime, though in-planing regime function boat. ...

This paper describes and presents preliminary experimental results from a novel prototype energy scavenging system installed in a model 2m cylindrical Autonomous Underwater Vehicle (AUV). The system, which is based on control moment gyroscope (CMG) principles, utilises the gyroscopic response of a gimballed flywheel mounted within an AUV body to generate energy from the wave induced rotational ...

Abstract A new concept design Catamaran Decommissioning Unit has been developed by Research Center for Hydrodynamics Technology Indonesia. The catamaran a unique shape, however in order to achieve resilient and sustainable the decommissioning unit as it resistance analysis both model testing numerical calculation must be conducted. value from needs validated with results towing tank. of scaling...

Due to their good mechanical properties composite materials are increasingly applied for the construction of lifting surfaces in maritime industry. However, besides improving strength weight ratio a structure, anisotropic material can also exhibit bend-twist coupling, when exposed higher loads. In order experimentally measure fluid structure interaction, object investigation needs same loadings...

Flows around a wedge-shaped bow are simulated with the aim of investigating the wave breaking mechanism and small scale features of ship bow waves. The wedge geometry used in the experimental study of Waniewski et al. (2002) is chosen with the flow conditions at Re = 1.64×10 5 and Fr = 2.93. The bow wave structure, wave breaking process and air entrainment are studied. The predicted overall bow...