... by introducing a combination of state-space model and energy gridding. To demonstrate the proposed method, one numerical example of three slow varying frequency components was used. Specifically, a field test on an offshore wind turbine located in the Putuo of Zhejiang Province of China is introduced...

... noise signal original signal frequency component emd method imf component amplitude decomposition eemd method Signal Analysis of Ship Hull Structure Response Subjected to Underwater Explosion Based on Modified Empirical Mode Decomposition Method Fulin Yu1 , Lingling Ji1, Hui Wang2, Lei Song1...

... wave attenuation mechanism spectra reflection coefficient coefficient artificial reef wave condition frequency component significant wave height wave height short wave turbulent kinetic energy Wave Attenuation Mechanism of the Artificial Reef in Beidaihe, China Yue Ma, Cuiping Kuang...

... frequency numerical simulation upstream oil & gas inline vibration platform contour vibration vortex-induced vibration modal analysis top-tensioned riser displacement riser simulation viv-foam-sjtu solver frequency component modal transition vibration frequency riser model Modal...

... will affect the dynamic response, etc. cylinder amplitude response frequency component buoyancy module offshore technology conference coverage ratio frequency trajectory displacement full coverage model experiment different position vibration riser model diameter high frequency...

... or S for wave frequency component, and VLi is twice the standard deviation of R or S for low frequency component. nWi and nLi are the number of cycles per year for wave and low frequency components, respectively. QWi and QLi are the zero up-crossing frequency in Hz of wave and low frequency components...

... virtual source approach equation upstream oil & gas fluid dynamics frequency component integration velocity potential wave tank tank geometry discretisation amplitude airy solution green function virtual source method boundary condition The Virtual Source Approach to Non-Linear...

... of fatigue life by changing breaking strength of mooring line, the effect of breaking strength on fatigue life variation is also discussed. wind turbine byoung wan kim rotor-supporting tower frequency component base stress tower base stress time series line tension renewable energy hong...

... motions of the vessel are monitored during the transportation. The measurements lasted 6 days. The maximum peakpeak value recorded for roll and pitch motions is 1.07 and 0.23 degrees respectively, which is smaller than the threshold design value. Low frequency component is observed from the roll signal...

... Finite element Hydroelasticity P1 0.912 0.925 0.892 P2 2.102 2.001 1.975 139 VBM Analysis under Zero Speed Fig.7 shows the test results of VBM in zero speed with comparison to the numerical results. There is no obvious high frequency component in VBM, but the simulation result was slightly larger than...

... to defocusing process locations), due to limited experimental measurements. frequency component displacement long component evolution experiment wave packet linear paddle displacement wave component interaction wave paddle intermediate water depth surface elevation frequency long wave...

..., these are based on linear wave theory; therefore, nonlinear interactions among frequency components are ignored. In this study, a modified form of the nonlinear elliptic mild-slope equation is used to numerically model the nonlinear wave transformation. The Alternating Direction Implicit (ADI) scheme is employed...

... such as low frequency component and wave frequency component. So, total fatigue damage should be obtained by combining those components. Three methods such as SS (Simple Summation), CS (Combined Spectrum) and CSDN (Combined Spectrum with Dual Narrow Band) are applicable in combining strategies. This study...

... have experimentally analyzed the dynamic behavior of a riser under uniform currents. behavioral characteristic amplitude keulegan-carpenter number excitation frequency component kc number dynamic behavioral characteristic test model sensor fbg sensor cross-flow response frequency...

... the direct-current component, low-frequency component, high-frequency component and integral constant item are put forth. The integral method of acceleration data in time domain and in frequency domain is also put forth. The key technical problems in measurement system of ships wave movement based...

... to design the supporting system for prevent from occurring human errors of operators during ship navigation. probability instruction cardiology support system ship frequency component navigation marine transportation tensional situation operation tensional stress degree human error...

... of the time history of the freak wave and impact force revealed that wide range of frequency components were contained in them. The coherence analysis was done on the wave and its impact force time histories. The coherence analysis reveals that some high frequency components are highly correlated with impact...

... ABSTRACT ISO6954 was substantially revised in December 2000. The new standard introduces the weight function and, we must evaluate overall value with the amplitude set in weight (Matsumoto, 2000. Sasajima, 1999). So we must use several frequency components. According to the revision of ISO6954...

... ABSTRACT The wave breaking-induced dynamic pressure due to a submerged trapezoidal breakwater is investigated experimentMly relating to the properties of the entrained air bubbles in this study. Experimental results have revealed that high frequency components of the dynamic pressure...

...-frequency motion of the surface vessel, the FIR digital filter is introduced to a PID-based controller. It can be shown numerically that the high frequency component of the ship's motion can be effectively filtered out by using the FIR low pass filter. KEY WORDS: Deep-sea mining buffer, Thrust control, Mode...