摘要
针对动态载荷作用,对板结点结构进行了动力有限元分析,得到容易产生疲劳破坏的结构危险点和应力幅值。根据疲劳和模糊的理论,用S-N曲线和模糊综合评判的方法对构件的疲劳寿命进行了估算,不但考虑了随机性对疲劳寿命的影响,而且考虑了模糊性对疲劳寿命的影响,使板结点结构疲劳寿命预测结果更加接近实际。还给出了海洋钢结构中典型板结点在动态载荷作用下的疲劳寿命模糊评判。
A dynamic finite element analysis for plate joints with dynamic loading was carried out.The dangerous parts of the structure where fatigue is easily to occur and the amplitudes of stress were obtained.With the theory of fatigue and fuzzy,the fatigue life was evaluated by using SN curves and comprehensive fuzzy assessment.method.Thus,both the effects of randomness and the fuzziness have been considered and the results will be more reasonable and accessible.In addition,the fuzzy assessment of fatigue life under dynamic loads of plate joints in offshore engineering was conducted in this paper as well.
出处
《中国海洋平台》
2002年第6期19-23,共5页
China offshore Platform
