针对螺栓连接薄层单元建模中存在的不确定性问题开展研究。对薄层的厚度、弹性模量和密度等参数进行正交设计，通过信噪比分析和回归分析，建立了连接结构振动响应和薄层参数的经验表达式，最后进行了优化分析。研究表明，鲁棒设计在薄层单元的不确定性建模中的应用是可行的，该方法完善了螺栓连接薄层单元的建模理论。
The uncertainty problem in finite element modeling was concerned. Dynamic response parameters in the thin-layer evaluated were the thickness, young modulus and density of the thin-layer element. An orthogonal array, signal-to-noise (S/N) ratio were employed to analyze the effect of these the dynamic response parameters. With the expression got from regression analysis, an optimization was executed to find the best parameters of the thin-layer element. The study shows that the robust method was suitable to solve the uncertainty problem with minimum number of trials as compared with a full factorial design.
2019,41(7): 137-140 收稿日期：2019-03-05
DOI：10.3404/j.issn.1672-7649.2019.07.027
分类号：TJ391
作者简介：李昊(1978-),男,博士,工程师,研究方向为导弹发动机研究
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