既有空间结构位形推算的随机偏差方法

发布时间：2018-04-24 14:22

本文选题：空间结构 + 位形推算　；参考：《同济大学学报(自然科学版)》2017年06期

【摘要】：根据未测节点空间位置的不确定性和随机分布特性,提出了结构位形推算的随机偏差方法.结合空间结构特点,给出随机偏差方法的抽样测点选取原则和最小样本容量确定方法.基于概率论及数理统计理论,给出随机偏差方法的偏差分布推断方法.引入先验信息概念,基于贝叶斯统计理论,给出有先验信息条件下的参数推断方法.对实际网壳结构采用该随机偏差方法推算结构实际位形,并进行整体稳定性分析,结果表明基于随机偏差方法的鉴定分析结果更符合实际.
[Abstract]:Based on the uncertainty and random distribution characteristics of unmeasured nodes in space, a random deviation method for structural configuration estimation is proposed. According to the characteristics of spatial structure, the principle of sampling point selection and the method of determining the minimum sample size of random deviation method are given. Based on probability theory and mathematical statistics theory, the method of inferring deviation distribution of random deviation method is presented. This paper introduces the concept of prior information and gives a parameter inference method based on Bayesian statistical theory under the condition of prior information. The random deviation method is used to calculate the actual configuration of the real reticulated shell structure, and the overall stability analysis is carried out. The results show that the identification and analysis based on the random deviation method is more practical.
【作者单位】：同济大学土木工程学院;
【基金】：国家自然科学基金(51678431)
【分类号】：TU317

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