Rapid Prediction of Worst-Case Gust Loads Following Structural Modification
Rapid Prediction of Worst-Case Gust Loads Following Structural Modification
复制标题
结构改造后最坏情况阵风载荷的快速预测
DOI：
10.2514/1.j052031
复制
发表时间：
2014
期刊：
影响因子：
2.5
通讯作者：
J. Cooper
中科院分区：
文献类型：
--
作者：
H. H. Khodaparast;J. Cooper
本文介绍了一种减少确定飞机最坏情况阵风载荷所需的计算工作量的方法，特别是当结构修改作为设计过程的一部分时。采用Sherman-Morrison-伍德伯里公式，采用重分析方法确定修改结构的阵风响应，并进行有效的模态重分析。使用简单机翼和全尺寸飞机有限元模型成功地证明了该方法，以确定结构修改后的最坏情况“1−余弦”阵风。阵风响应计算节省了约56%，模态再分析节省了50%。
An approach to reduce the computational effort required to determine the worst-case gust loads for aircraft is described, specifically when structural modifications are included as part of the design process. The Sherman–Morrison–Woodbury formula is employed to determine the gust response of the modified structure using a reanalysis approach and to undertake an efficient modal reanalysis. The approach is demonstrated successfully using a simple wing and full-scale aircraft finite-element models to determine the worst-case “1−cosine” gust following structural modification. Savings of about 56% were achieved for gust-response computations and 50% for the modal reanalysis.