... design asia government offshore pipeline modal frequency upstream oil & gas europe government spool midstream oil & gas stiffness lift force slug force time history hybrid method slug flow force time history lift coefficient fiv analysis spool viv china government canada...

... methods; then it uses the identified modal frequencies and modal damping ratio as dominant features to perform supervised classification. Three supervised learning algorithms (i.e. Decision Trees, k Nearest Neighbors, and Support Vector Machines) are used here. The results show that though the three...

... responsibility accelerometer modal frequency structural modal frequency spectrogram artificial intelligence frequency metrology mast taiwan power company long-term structural vibration monitoring investigation vibration wind turbine offshore structure structural vibration Long-term Structural...

... 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...

... submerged finite elliptic cylindrical shell vibration stiffener circular cylindrical shell circumferential modal parameter modal frequency submerged elliptic cylindrical shell ring stiffener axis frequency elliptic cylindrical shell equation ellipticity cylindrical shell...

... 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...

... of historical recorded earthquake excitations. The dynamic responses of the riser under the earthquake excitations were analyzed in terms of displacement and stress. The modal analysis of the riser was conducted and its modal frequencies were studied against the frequency range of earthquake waves to find...

... platform model order excitation singular value offshore platform low rank approximation irf artificial intelligence hankel matrix noise elimination matrix modal parameter identification frequency modal parameter approximation modal frequency subsea system Experimental Studies on Modal...

... the existence of structural damage. modal frequency outlier analysis environmental factor principal component analysis hilbert-huang transform novelty detection hilbert transform variation identification temperature variation machine learning artificial intelligence natural frequency damage...

... members based on only a few measured modal frequencies of the true offshore jacket structure system. The purpose of this model updating is for matching the modal frequencies of the analytical model (for the combined system of superstructure and its pile foundation) well with the corresponding measured...

... ABSTRACT The change of modal parameters, including modal frequencies and mode shapes, has been used as the basis for various vibration-based damage detection methods. Under the assumption that stiffness-loss damages have occurred only at several structural members, this article develops...

... ABSTRACT Accurate estimate of the modal frequencies and damping ratios of a structure is crucial to many practical engineering problems, including damage detection, structural health monitoring, etc. This article introduces the Prony's method for identifying multiple modal frequencies...

... are not close to the lower modal frequency of the structure. The range of wave striking angles that does not disturb the modal identification should be found out for each lower-frequency mode respectively. The choosing method for one lower-frequency mode for 4-leg platforms is described as follows: 1) Determine...