Method for predicting service life of maritime work structure

Abstract

The invention provides a maritime work structure life prediction method, which comprises the steps of arranging a plurality of strain monitoring points on a to-be-measured maritime work structure, and reconstructing full-field strain dynamic response of the to-be-measured maritime work structure according to actually measured strain components obtained by the strain monitoring points; according to the predicted strain component and the actually measured strain component of each monitoring point, determining the predicted confidence coefficient of the strain of the strain monitoring point; according to the full-field strain dynamic response of the to-be-tested maritime work structure, generating a residual stress field in the to-be-tested maritime work structure, and determining a dynamic stability load domain; and predicting the residual life of the maritime work structure according to the dynamic stability load domain. According to the embodiment of the invention, the service life of the structure is predicted based on the dynamic strain reconstruction and dynamic stability analysis method of modal expansion, the calculation is simple and feasible, and the precision of the prediction result is high.

Description

technical field [0001] The invention relates to the technical field of marine structures, in particular to a method for life prediction of marine structures. Background technique [0002] Wind power construction is developing towards offshore wind power. In addition to wind loads and other effects, wind power towers and blades are also affected by load impact and corrosion caused by natural environmental factors such as waves and tidal currents. Due to the difficulty of determining the external environmental loads, traditional sensors such as strain gauges are widely used to collect operational data, but these traditional methods cannot provide full field data, but can only display measurement data at several discrete locations, in fact in many cases Damage occurs in unmonitored areas or points that cannot be monitored, so the deformation and stress of the structure are difficult to estimate, and the life prediction of offshore wind power structures is a technical problem. ...

AI Technical Summary

Problems solved by technology

Due to the difficulty of determining external environmental loads, traditional sensors such as strain gauges are widely used to collect operational data, but these traditional methods cannot provide full field data, but can only display measurement data at several discrete locations, in fact in many cases Destruction occurs in unmonitored areas or points that cannot be monitored, so the deformation and stress of the structure are difficult to estimate, and the life prediction of offshore wind power structures is a technical problem

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