Transfer Path Analysis for Semisubmersible Platforms Based on Noisy Measured Data

A new energy transfer path analysis (TPA) method that aims to analyze the transfer path of components with characteristic frequencies in semisubmersible platform structures is proposed in this paper. Due to the complexity of semisubmersible platforms, traditional TPA methods based on measurements are no longer applicable. In the proposed method, the structure is considered to be a “source-path-receiver” system and the vibration signals from the source-points are analyzed first to determine the characteristic components. Then, the signals from the source-points and the receiver-points are decomposed by introducing a state–space model. Through correlation functions, the characteristic components can be extracted, and the transfer path can be obtained by calculating the transmissibility functions. By using transmissibility functions, the proposed method only relies on the output responses and avoids the measurement of force and transfer functions. Three examples, one numerical example containing a two-degree-of-freedom (2-DOF) model and a 5-DOF model, one experiment implemented on a barge, and the data from a dynamic positioning (DP) cabin of a semisubmersible platform were used to investigate the performance of the proposed method. The results show that the proposed method can be used to assess the transfer path quantitatively and has potential value of application in engineering.

[1]  D. de Klerk,et al.  Operational transfer path analysis: Theory, guidelines and tire noise application , 2010 .

[2]  Mohieddine Jelali,et al.  A brief review and a first application of time-frequency-based analysis methods for monitoring of strip rolling mills , 2015 .

[3]  Il-Kwon Oh,et al.  Modified transfer path analysis considering transmissibility functions for accurate estimation of vibration source , 2017 .

[4]  Herman Van der Auweraer,et al.  Critical assessment of operational path analysis: effect of coupling between path inputs , 2008 .

[5]  David Thompson,et al.  The quantification of structure-borne transmission paths by inverse methods. Part 1: Improved singular value rejection methods , 2003 .

[6]  Christof Devriendt,et al.  Operational transfer path analysis , 2010 .

[7]  J. M. N. Silva,et al.  ON THE GENERALISATION OF THE TRANSMISSIBILITY CONCEPT , 2000 .

[8]  Zhe Tian,et al.  Fluid-structure interaction analysis of offshore structures based on separation of transferred responses , 2020, Ocean Engineering.

[9]  Huajun Li,et al.  Weak-mode identification and time-series reconstruction from high-level noisy measured data of offshore structures , 2016 .

[10]  Tiangui Ye,et al.  Isogeometric three-dimensional vibration of variable thickness parallelogram plates with in-plane functionally graded porous materials , 2020 .

[11]  Zhe Tian,et al.  A Laplace-domain method for motion response estimation of floating structures based on a combination of generalised transfer function and partial fraction , 2019, Ships and Offshore Structures.

[12]  A. S. Naser,et al.  Structural Health Monitoring Using Transmittance Functions , 1999 .

[13]  Hongde Qin,et al.  Frequency response estimation of floating structures by representation of retardation functions with complex exponentials , 2017 .

[14]  Wim Desmet,et al.  Application of the transmissibility concept in transfer path analysis , 2010 .

[15]  B. Dobson,et al.  A Review of the Indirect Calculation of Excitation Forces from Measured Structural Response Data , 1990 .

[16]  Zhongxiao Peng,et al.  A new nonlinear blind source separation method with chaos indicators for decoupling diagnosis of hybrid failures: A marine propulsion gearbox case with a large speed variation , 2016 .

[17]  Zhe Tian,et al.  Interference reduction of high-energy noise for modal parameter identification of offshore wind turbines based on iterative signal extraction , 2019, Ocean Engineering.

[18]  Juha Plunt,et al.  Finding and Fixing Vehicle NVH Problems with Transfer Path Analysis , 2005 .

[19]  Oriol Guasch,et al.  Experimental validation of the direct transmissibility approach to classical transfer path analysis on a mechanical setup , 2013 .