【摘要】 针对海洋平台结构特点,将海洋平台结构分为若干子结构,基于模态曲率法结合模态应变发展了一种适用于海洋平台结构的损伤识别与定位方法。为了验证该方法的可行性和有效性,以一典型导管架平台为数值算例,建立有限元损伤模型,分别进行了单构件损伤及多构件损伤时的识别效果研究。数值计算结果表明将模态曲率法和应变模态相结合进行海洋平台的损伤识别与定位是切实可行的。更多还原

【Abstract】 The offshore platform stucture is divided into many substructures basing on its structural features.Based on mode curvature and strain mode methods,a new method of damage identification and localization for offshore platforms is developed.To validate the feasibility and availability of the method,a typical jacket platform is selected as a numerical example.The FE damage model of the jacket platform is built up,and identification effects on the condition of single member damage and multiple member damages are studied respectively.Numerical results show that the new method combining mode curvature method with strain mode method is feasible to identify and locate the damage of the offshore platforms.更多还原