... hydrate media on seismic profile possess low velocity and low amplitude, high frequency characteristics, through comprehensive analyzing and interpreting the seismic and well logging and geological data. According to the dynamic features of the reflections and logging results, anomaly segments of natural...

...-ocean mining. In 1968, a heave compensation system between travelling block and hook used in oil drilling platform was proposed by VETCD Company, USA. It was composed of hydraulic cylinders, accumulator, locking device etc. The hydraulic cylinder displacement is larger than the heave amplitude of wave...

... the initial methane hydrate saturation was 30% (Fig.5). To investigate the dynamic properties of HBS, dynamic triaxial experiments were carried out under sine loads with amplitudes ranging 1-3mm and a frequency of 1Hz. Before carrying out experiments, the samples with 100% THF hydrate concentration were first...

..., 1989; Chatjigeorgiou, 1998) and lump mass method (Nakajima, 1982; Ghadimi, 1987). metals & mining mining machine walk amplitude deep-ocean mining operation inner fluid displacement space configuration sea current absolute value configuration flexible hose mining machine maximum...

...-accelerometer system prototype model soil sample gimbaled mechanism displacement waveform apparatus displacement acceleration waveform sensor amplitude Seafloor Displacement Monitoring by Double Integral Technique Using Servo-accelerometer System Tatsuya Yokoyama, Hideki Saito, Hiroshi Kameya...

... includes normal component nV and tangential component V . The small amplitude Airy wave theory is used to describe the wave (Wheeler, 1970). The normal hydrodynamic force per unit length is given by (Chung, White and Loden, 1980,1981): wnwnMwnnDwn V dVCdVVdCF 442 1 22 & (7) where DC is normal drag...

... self-propelled vehicle amplitude velocity curve Dynamic Simulation of COMRA's Self-Propelled Vehicle for Deep Ocean Mining System Zhenyu Wang, Shaojun Liu, Li Li, Bihua Yuan, Gang Wang Central South University, Changsha, Hunan, P.R. China ABSTRACT A new parameterized modeling method Adams Tracked...

... or nonlinear deflection. For such 3-1) nonlincar couph:d vibrations. axial vibration dampers along a long pipc will not only reduce the axial vibration amplitudes, but also influence the bending and torsionalllmplitudes. This paper presents some design as well as operational aspects of an articulated pipe...

... the amplitude of longitudinal vibrution and the axial stress induced in the pipe string for mining mangane- se nodules from deep sea-Ooors, various countermeasures, such 8S the utilization of lhe shape-dr~t of the buffer equipped at the lower end of the string, a vibration absorber attached to the buffer...

... ABSTRACT: In order to reduce the longitudinal vibration of the pipe string in mining manganese nodules from deepsea bottoms, the investigation of the shape effects of various buffers attached to the string reported that the resonance amplitude of the buffer whose shape caused a larger drag...

... along the pipe and torsional moments. axial stress metals & mining offshore isope deflection axial damper chung pipe system stiffness elastic joint cheng bottom end buffer pipe vibration torsion axial vibration amplitude displacement Proceedillgs of the ISOPE - Oceall...