A Calculation Method for Structural Stress of Floating Ocean Structures Based on Spectrum Analysis Method

Abstract

The invention provides a method for calculating the structural stress of a floating marine structure based on a spectrum analysis method, and belongs to the technical field of structural strength analysis and evaluation of marine floating structures. A method for calculating the structural stress of floating marine structures based on spectral analysis method includes the following steps: the first step is to establish a model; the second step is to calculate the structural stress transfer function; the third step is to parameterize the wave spectrum; the fourth step The first step is to calculate the structural stress energy spectrum; the fifth step is to calculate the short-term sea state spectral moment; the sixth step is to calculate the short-term probability density function; the seventh step is to calculate the wave scatter diagram; the eighth step is to calculate the wave direction probability; the ninth step is to Calculate the long-term probability density function; the tenth step, calculate the long-term statistical value of the structural stress; the eleventh step, check; the present invention not only considers the operating sea area environment, but also considers the total strength and local strength of the floating marine structure , with more comprehensive consideration and higher adaptability, and at the same time, through computer calculation, the error problem caused by manual operation is eliminated.

Description

Technical field[0001]The present invention relates to the technical field of marine floating structural strength analysis and evaluation, and in particular, to a form of floating marine structural stress based on spectrum analysis method.Background technique[0002]With the advancement of human society, terrestrial resources have been depleted, and human society gradually began to develop and utilize marine resources, such as marine oil and gas development, marine mineral mining, marine mineral mining, marine mineral mining, marine mining, marine mineral mining, marine mining Since the development and utilization of the ocean is still in the starting stage, and the development of marine activities relies on floating marine structures as a platform. When the diversity of platform functions, traditional ship type floating marine structures cannot meet each Various marine development needs, result in a variety of floating marine structures, such as cylindrical, mast stability and cube.[0...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned problems existing in the prior art, it is now intended to provide a method for calculating the structural stress of floating marine structures based on spectral analysis method, combined with the marine environmental conditions of the operating sea area of ​​floating marine structures, based on the expected probability level, Statistically calculate the structural stress at any position of the floating marine structure, and through finite element calculation, more comprehensively evaluate the structural strength of the floating marine structure at the expected probability level, and solve the incompleteness and adaptability of the current evaluation method sex problem

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