... supports. rectangular plate stiffness characteristic mode sequence finite element method china government frequency calculation result mode shape different position modeling & simulation boundary condition spring stiffness rectangular thin plate transverse vibration characteristic...

... wind speed displacement wave force fatigue failure anemometer flange member force vane anemometer deviation vibration ultrasonic anemometer meteorological tower offshore meteorological tower soon-duck kwon mode shape wind energy vortex-induced vibration frequency sea level...

.... The losing data ratio was very low and structural modal information. In this step, both the range of natural still satisfy for following analysis. frequency and the mode shape are used to identify criteria for determining structural modal information. CHRONOLOGICAL FDD PROCEDURE To chronological extract...

... ABSTRACT This paper presents the analysis of the modal frequencies and mode shapes of the Vestas four-rotor wind turbine using two operational modal analysis methods. The Frequency Domain Decomposition method is used for standstill analysis, and the Ibrahim Time Domain method is used...

... mode shapes are determined through the application of a FEM based structural model. The diffraction/radiation problem is solved using the boundary integral equation method. Focus is given on the flexible modes' generalized hydrodynamic forcing and responses, the spar's hydroelastic response...

... model artificial intelligence ibrahim stick state jenkins element random decrement technique simulation mode shape identification signature bridge finite element model slip state Identification of friction-coupled offshore platforms by output-only method Tobias Friis*, Karsten K...

... tdz earthquake strain response riser transversely dynamic response touchdown zone upstream oil & gas seismic loading catenary zone time history excitation frequency seismic response loading interaction steel catenary riser pipeline mode shape ABSTRACT The steel...

... of fixed jacket offshore platform is established. The natural frequency and mode shapes of offshore platform are calculated; its dynamic responses under seismic loadings are studied numerically. In the present work, a fixed jacket offshore p latform (Model: JZ20- 2MUQ), consisting of a steel tubular-space...

... with this for many years. offshore structure experiment upstream oil & gas operational modal analysis brincker identification spacial distribution mode shape modal parameter case study fe model wave loading estimation matrix loading wave height simulation load estimate load...

.... In this work, we aim to clarify the dynamics of a flexible cylinder that undergoes vortex-induced vibrations in a systematically designed experiment to see the effect of structural mode shape on the excitations. In the experiments, we test three bending dominated flexible cylinders and compare the results...

... ABSTRACT In this paper, linear and frequency-domain hydroelastic analysis is performed for investigating the behavior of a free floating, annular and flexible plate. A "dry" mode superposition approach is utilized, where the flexible mode shapes are determined through the derivation...

... of the data processing provided by the monitoring system, employed to perform spectral analysis and dynamic identifications. The frequencies and the mode shape were analyzed in order to assess their variability during the life of the platform. The variation of mode shapes and main periods can be related...

... have multiple wind turbines as well as wave energy converters. Particularly, KRISO designed a conceptual offshore renewable energy platform that hosts 4 wind turbines at corners and a series of point-absorber type wave energy converters along each side. mode shape resonance hydroelastic...

... platform identification subsea system acceleration signal frequency national natural science foundation time history mode shape procedure modal frequency modal parameter diff segment 2 ice load simulation prce method response data response signal excitation Modal Parameter...

... cylinder mode shape amplitude natural frequency simulation inline displacement matrix displacement vibration upstream oil & gas numerical result vortex-induced vibration multi-strip method 3UHGLFWLRQ RI UHVSRQVH IRU YRUWH[ LQGXFHG YLEUDWLRQV RI D IOH[LEOH ULVHU SLSH E\ XVLQJ PXOWL VWULS...

... Experimental Study of Mode Shapes Using the Residues of Measured Data Chao Wanga, Hongchao Lua*, Wei Lib, Fushun Liua aCollege of Engineering, Ocean University of China. Qingdao, China bPowerchina Huadong Engineering Corporation Limited. Hangzhou, China ABSTRACT This paper focuses...

... connection system jumper hydrotest receiver structure mode shape viv fatigue analysis result site integration testing jumper fabrication upstream oil & gas template fabrication DESIGN AND INSTALLATION OF FLOWLINE JUMPER FOR SOUTH CHINA SEA APPLICATION Zhigang Li, Ning He, and Bo Wang China...

.... It relates fatigue life to the natural frequencies and mode shapes of the pipe, and assumes linear soil behaviour. However, soil is shown to behave nonlinear, which means the pipe may lift up from the bed. This can have severe consequences when investigating multi-spans. The experimental work done...

... boundary finite element method under zero external excitation and solutions of SBFEM equations are expressed in details, then the natural mode shapes of sloshing and their corresponding frequencies are can be obtained. The SBFEM needs discretize only the water surface and walls with curved surface finite...

..." fatigue damage due to VIV is typically calculated by mode shape reconstruction in the frequency domain that can be calibrated by the logged accelerations at various riser locations. In addition to VIV fatigue, direct wave loading also contributes to the total fatigue damage. Sometimes wave fatigue may...