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arXiv 0705.2515stat.AP
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基于贝叶斯方法的有限元模型修正

Finite Element Model Updating Using Bayesian Approach

Tshilidzi Marwala, Lungile Mdlazi, Sibusiso Sibisi

摘要:

本文比较了有限元模型修正的极大似然法和贝叶斯法。最大似然法采用遗传算法实现,贝叶斯法采用马尔可夫链蒙特卡罗实现。对一简支梁和一非对称H型结构进行了试验研究。结果表明,贝叶斯方法给出了更新的有限元模型,预测更准确的模态特性比更新的有限元模型,通过使用最大似然法。此外,发现这两种方法需要相同水平的计算负载。

英文摘要:

This paper compares the Maximum-likelihood method and Bayesian method for finite element model updating. The Maximum-likelihood method was implemented using genetic algorithm while the Bayesian method was implemented using the Markov Chain Monte Carlo. These methods were tested on a simple beam and an unsymmetrical H-shaped structure. The results show that the Bayesian method gave updated finite element models that predicted more accurate modal properties than the updated finite element models obtained through the use of the Maximum-likelihood method. Furthermore, both these methods were found to require the same levels of computational loads.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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