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Dynamic response solving method suitable for ocean floating structure

A floating structure and dynamic response technology, applied in ICT adaptation, special data processing applications, instruments, etc., can solve the problems of rapid and accurate prediction of dynamic response, early warning of unfavorable structural design engineering safety, and difficult calculation of transient state by frequency domain method Response and other issues to achieve rapid calculation and forecasting, clear physical meaning, and improved accuracy

Active Publication Date: 2021-11-19
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

But generally speaking, the existing time-domain method still needs to solve the convolution term in the Cummins equation, the solution efficiency is low and the error accumulation is serious, and it cannot meet the needs of short design cycle or fast and accurate prediction of dynamic response during operation and maintenance; the existing frequency-domain method It is difficult to calculate the transient response by the method, and the prediction accuracy depends on the selection of the frequency coefficient, which is not conducive to structural design and actual engineering safety warning

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  • Dynamic response solving method suitable for ocean floating structure
  • Dynamic response solving method suitable for ocean floating structure
  • Dynamic response solving method suitable for ocean floating structure

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Embodiment 1

[0059] like Figure 1-3 As shown, this embodiment provides a dynamic response solution method suitable for marine floating structures. Taking the numerical model of floating wind turbines as the calculation object, the stiffness matrix caused by mooring needs to be considered at this time, mainly including the following steps:

[0060] S10. Establish a state-space model of the dynamic equation of the floating structure, and construct state-space model parameters.

[0061] In this step, first solve the dynamic response of the existing floating structure in the time domain, and use the Cummins equation to express, there is:

[0062]

[0063] Among them, M is the mass matrix; M a is the additional mass matrix; K(t) is the delay function; C is the hydrostatic restoring force coefficient matrix; x(t) and f exc (t) respectively correspond to the acceleration, velocity, displacement and wave load of the floating body under six degrees of freedom.

[0064] Then decouple equati...

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Abstract

The invention belongs to the technical field of ocean engineering dynamic calculation, and provides a dynamic response solving method suitable for an ocean floating structure. The method comprises the following steps: S10, establishing a state space model corresponding to a floating structure motion equation, and constructing state space model parameters; S20, based on the floating structure motion equation, constructing a transfer function and a rational score form thereof, and establishing a relationship between the state space model parameters and transfer function coefficients; S30, linearly solving transfer function coefficients in a rational fraction form; S40, according to the solved transfer function coefficients, solving the state space model parameters in a time domain; S50, based on the state space model, substituting the solved state space model parameters, and calculating and forecasting a dynamic response of each freedom degree of of the floating structure. According to the method, high-efficiency calculation and forecasting can be realized, and the forecasting accuracy can be ensured.

Description

technical field [0001] The invention belongs to the technical field of marine engineering dynamic calculation, and in particular relates to a dynamic response solution method applicable to marine floating structures. Background technique [0002] In recent years, with the development of offshore wind power, offshore oil platforms and other offshore projects into deep and open seas, new demands have been put forward for marine floating structures at different levels. However, whether it is a floating offshore wind turbine or a floating offshore platform, considering structural safety and equipment durability, the dynamic response of the floating structure under the action of complex random waves cannot be ignored. This requires that both the floating wind turbine and the floating offshore platform need to evaluate and predict the dynamic response during the design stage or the operation stage, so as to ensure the reliable operation of the floating structure. [0003] Typical...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F17/14G06F17/15G06F17/16
CPCG06F30/20G06F17/141G06F17/15G06F17/16Y02E10/727
Inventor 樊天慧卢洪超陈超核严心宽马远杜昱宏周诗博曾祥斌林楚森
Owner SOUTH CHINA UNIV OF TECH
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