Abstract：For offshore jacket platforms, the influences of seawater temperature gradient on modal strain energy method, which is one of the methods for structural global damage detection, were studied. Taking a Jacket-type offshore platform as a model, the finite element model under the simulated seawater temperature gradient was built regarding the influences of temperature on steel elastic modulus. By detecting and analyzing the damage simulated on this model using mode strain energy method, the influence rules of temperature gradient on damage detection to offshore platform based on modal strain energy method were summarized. It is demonstrated that the temperature gradient weakens the ability of damage location using the method, especially for the members with greater structure redundancy, and it also reduces the precision of damage extent detection, the reduction will be greater for the members with greater structure redundancy and lower damage extent.
刘克飞;石湘;周雷;王凤云. 考虑温度梯度的模态应变能法海洋平台损伤检测研究[J]. , 2012, 31(6): 90-95.
Liu Ke-fei;Shi Xiang;Zhou Lei;Wang Feng-yun. Research of damage detection to offshore platforms based on modal strain energy method considering the temperature gradient. , 2012, 31(6): 90-95.
2012, Vol. 31 
