摘要
以自升式平台为研究对象,开展了结构振动检测实验,结合三维软件模型,引入增强频域分解方法对平台进行了模态识别,并研究了质量对各阶模态频率影响的灵敏度。计算表明,通过关注灵敏度高的测点或阶次的改变可以了解结构性能的变化,从而为海洋工程结构强度评估工作提供了重要的补充手段。
A test of structural vibration is proceeded for Jack-up and the modes are identi- fied based on 3-D model and EFDD method. Then the sensitivity is studied between nodal mass and modal frequency, and the results obtained show that the change of structural per- formance can be inferred though the high level of nodal or modal sensitivity, which is an im- portant mean of the structural assessment for offshore platforms.
出处
《中国海洋平台》
2015年第4期88-92,100,共6页
China offshore Platform
