Response surface model-based ocean floating platform hotspot stress calculation method

Abstract

The invention relates to a response surface model-based ocean floating platform hotspot stress calculation method. The method comprises steps that S1, a response surface model of ocean floating platform structure hot spot stress is established, and control parameters are introduced according to the nonlinear influence on the ocean floating platform structure hot spot stress; S2, a stress analysisnumerical model of an ocean floating platform is established, numerical values of influence factors are changed through a numerical calculation method, hot spot stress under corresponding conditions is obtained, fitting of a function relationship between the hot spot stress and each factor is performed by adopting a regression equation, a corresponding coefficient of a control parameter is determined, and a hot spot stress calculation formula is established according to the corresponding coefficient; and S3, wave environment monitoring is carried out on the position where the ocean floating platform is located, a space near-field measuring point of a hot spot is selected to carry out stress monitoring, a result is inputted into a formula, and hot spot stress under the current sea conditionis obtained. Compared with the prior art, the method has advantages of small error, more comprehensive monitoring data, more authoritative calculation result and the like.

Description

technical field [0001] The invention relates to the field of ships and ocean engineering, in particular to a method for estimating hot spot stress of an ocean floating platform based on a response surface model. Background technique [0002] Ocean floating platform is a large offshore structure used for offshore exploration, drilling, and production. It has the characteristics of strong mobility and complex structure. It bears the wind, wave and current loads in the external marine environment at sea, which will generate greater stress at the hot spots where the structure is prone to damage, affecting the safety and usability of the structure. [0003] In order to obtain the hot spot stress at the key structure of the offshore floating platform and solve the problem that the hot spot stress of the complex structure is difficult to be directly monitored, a relatively accurate and reasonable hot spot stress calculation method is needed. In the prior art, the method for estima...

AI Technical Summary

Problems solved by technology

It bears the wind, wave and current loads in the external marine environment at sea, which will generate greater stress at the hot spots where the structure is prone to damage, affecting the safety and usability of the structure

[0003] In order to obtain the hot spot stress at the key structure of the offshore floating platform and solve the problem that the hot spot stress of complex structures is difficult to monitor directly, a relatively accurate and reasonable hot spot stress calculation method is needed

In the prior art, the method for estimating the hot spot stress mainly selects the stress of the measuring point at a specific location near the hot spot as the influencing factor, and uses the linear extrapolation method to estimate the hot spot stress, but this method does not consider the wave load characteristics, and considers There are too few influencing factors, and strict requirements are placed on the location of the measuring point

Images