摘要
对土性分布参数随机场模型和轴对称随机场的离散技术进行了研究 ,给出了计算和组集随机变量自协方差矩阵的方法 ,提出了多维相关正态分布随机数的产生技术 ,用 Neumann随机有限元法进行单桩沉降的可靠性分析 。
The paper studies the 3 dimension random fields modeling for spatial soil properties and the technique of axisymmetric random field's discretization by using local average approach. The computation and assembly method of covariance matrix is proposed in the paper. The algorithm for generating multi dimension correlated normal distributed random sample vector is also presented. The Neumann stochastic finite element method is applied to analyze the reliability of pile settlement, and the reliability index of the test pile settlement is obtained by using the Neumann SFEM program compiled by the author.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
2002年第1期70-75,共6页
Journal of the China Railway Society
基金
<高等学校骨干教师资助计划>项目 (教技司 [2 0 0 0 ] 65号 )
