海洋平台水动力系数识别及精度分析  

IDENTIFICATION OF HYDRODYNAMIC COEFFICIENTS ON OFFSHORE PLATFORM AND PRECISION ANALYSIS OF ITS RESULTS

作　　者：李少华[1,2] 时忠民 龙述尧[1] 丁桦[4] 

机构地区：[1]湖南大学机械与运载工程学院,长沙410082 [2]西安科技大学力学系,西安710054 [3]中海石油研究中心,北京100027 [4]中国科学院力学研究所,北京100190

出　　处：《固体力学学报》2011年第4期405-410,共6页Chinese Journal of Solid Mechanics

摘　　要：论文利用新动态模型减缩方法对海洋平台结构进行自由度减缩,利用简化后的模型对水动力系数进行反演,改善了反演模型中解的不确定性,并对载荷反演中的病态问题进行了探讨,同时给出了反演结果的评估方法,为反演中测量数据的获取提供了依据,提高了反演结果的可靠性.The degrees of freedom of the offshore platform structure are reduced by applying a new dynamic model reduction in this paper. Based on the simplified model, the hydrodynamic coefficients are identified. And the uncertainty of the solution in inverse problem is improved. The ill-conditioned problem in identification of force is subsequently discussed and the assessment method of the identification result is also presented, which provides a basis for acquiring the measurement data for identification and contributes to the improvement of reliability of the identification result.

关 键 词：水动力系数反演 病态 动态模型减缩 自由度减缩 

分 类 号：P75[天文地球—海洋科学]