水工建筑物安全监测布置优化方法研究
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摘要
如何用最少的测点反映水工建筑物的工作性态,是水工建筑物安全监测设计研究的难点。本文以水工建筑物有限元计算成果为依据,形成水工建筑物安全监测量的空间分布样本,通过聚类和主成分析,提取样本空间分布特征并对数据样本进行空间分块,由此提出水工建筑物安全监测布置的优化方法,并应用B样条曲面建模误差理论,对水工建筑物安全监测布置的结果进行评价。实例分析表明,该方法切实可行,为水工建筑物安全监测布置优化提供新思路。
Choosing the least points to monitor hydraulic structure behavior is the hard core of hydraulic structure safety monitoring design.In this work,spatial monitor-value sample of hydraulic structure and its typical curve surface,such as monitor-value curve surface,are obtained first,using FEM analysis result of the structure.Then this surface is divided into several parts,through cluster analysis and principal component analysis on the spatial character of hydraulic structure monitor value,and each part is assigned one monitoring point to represent its regional safety behavior of the entire structure.Finally,monitoring point layout of hydraulic structure safety is optimized and its assessment method is established based on B-spline surfaces and modeling error theory.Engineering case studies show that the optimization method,a new approach for optimizing monitoring points layout,is effective and practical.
Choosing the least points to monitor hydraulic structure behavior is the hard core of hydraulic structure safety monitoring design.In this work,spatial monitor-value sample of hydraulic structure and its typical curve surface,such as monitor-value curve surface,are obtained first,using FEM analysis result of the structure.Then this surface is divided into several parts,through cluster analysis and principal component analysis on the spatial character of hydraulic structure monitor value,and each part is assigned one monitoring point to represent its regional safety behavior of the entire structure.Finally,monitoring point layout of hydraulic structure safety is optimized and its assessment method is established based on B-spline surfaces and modeling error theory.Engineering case studies show that the optimization method,a new approach for optimizing monitoring points layout,is effective and practical.
引文
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[2]金涛,童水光,等.逆向工程技术[M].北京:机械工业出版社,2003.JIN Tao,TONG Shuiguang,et al.Reverse Engineering[M].Beijing:China Machine Press,2003.(in Chinese)
[3]吴雪梅,李瑰贤,赵伟民,等.基于三坐标测量机的点云数据测量规划研究[J].中国工程机械学报,2004,2(3):350-354.WU Xuemei,LI Guixian,ZHAO Weimin,et al.Study of measurement program to points cloud data of complex surface based onthree-coordinate measurement machine[J].Chinese Journal of Construction Machinery,2004,2(3):350-354.(in Chinese)
[4]梅长林,周家良.实用多元统计分析[M].北京:科学出版社,2002.MEI Changlin,ZHOU Jialiang.Practical Multivariate Statistic Analysis[M].Beijing:Science Press,2002.(in Chinese)
[5]方开泰.聚类分析[M].北京:地震出版社,1980.FANG Kaitai.Cluster Analysis[M].Beijing:Seismological Press,1980.(in Chinese)
[6]陈浪,秦大同,郑小光.基于形状特征的自由曲面建模技术[J].机械工程学报,2002,38(11):105-108.CHEN Lang,QIN Datong,ZHENG Xiaoguang.Free-form surface modeling based on shape characteristics in reverse engineering[J].Chinese Journal of Mechanical Engineering,2002,38(11):105-108.(in Chinese)
[7]Sarkar B,Menq C H.Smooth-surface approximation and reverse engineering[J].Computer Aided Design,1991,23(9):623-628.
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