基于模态曲率法的海洋平台结构损伤识别与定位研究

英文篇名：Damage identification and localization of offshore platforms based on mode curvature method
中文刊名：船舶力学
英文刊名：Journal of Ship Mechanics
作者：尚高峰 ; 嵇春艳 ; 张强 ; 陈明璐
英文作者：SHANG Gao-feng 1 ; JI Chun-yan2 ; ZHANG Qiang 2 ; CHEN Ming-lu2(1 China Ship Scientific Research Center ; Wuxi 214082 ; China ; 2 School of Naval Architecture and Offshore Engineering ; Jiangsu Unversity of Science and Technology ; Zhenjiang 212003 ; China)
中文关键词：海洋平台 ; 损伤识别 ; 模态曲率法
英文关键词：offshore platform ; damage identification ; mode curvature method
出版日期：2010-05-15
机构：中国船舶科学研究中心;江苏科技大学船舶与海洋工程学院;
年：2010
期：05
出版单位：船舶力学

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。
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.

引文

[1]Vandiver J K.Detection of structural failure on fixed platforms by measurement of dynamic response[C]//Proc of the 7th Annual Offshore Tech Conf.1975:243-252.
    [2]Yang Chen J.Damage detection in offshore platforms by the random decrement technique[J].Journal of Resources Tech-nology,ASME,1984,106(1):33-38.
    [3]姜绍飞,张永强,吴兆旗.基于一阶振型的海洋平台二阶段损伤定位方法[J].华中科技大学学报(城市科学版),2008,25(3):31-34.
    [4]李军,于德栋,白会人.基于应变模态的结构损伤定位方法[J].世界地震工程,2007,23(1):104-109.
    [5]吴波,方水平,肖林朵.曲率模态理论在桥梁损伤诊断中的有限元分析[J].山西建筑,2008,34(2):316-317.
    [6]曹晖,张新亮,李英民.利用模态柔度曲率差识别框架的损伤[J].振动与冲击,2007,26(6):116-120.
    [7]殷志祥,丁涛.基于模态曲率差参数的网壳结构损伤定位[J].辽宁工程技术大学学报,2007,26(6):859-861.
    [8]李忠献,齐怀展,朱劲松.基于模态曲率法的大跨度斜拉桥损伤识别[J].地震工程与工程振动,2007,27(4):122-126.
    [9]彭华,游春华,孟勇.模态曲率差法对梁结构的损伤诊断[J].工程力学,2006,23(7):49-53.
    [10]赵玲,李爱群.基于单元应变能变化率的结构损伤识别方法[J].东南大学学报(自然科学版),2007,37(6):1052-1056.
    [11]叶海靖,胡小聪,李恒村.基于小波奇异性的结构损伤检测[J].西部探矿工程,2009:180-182.
    [12]陈长征,罗跃纲.结构损伤检测与智能诊断[M].北京:科学技术出版社,2001.