...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Aeronautical Journal >Influence of weight modelling on the outcome of wing design using multidisciplinary design optimisation techniques
【24h】

Influence of weight modelling on the outcome of wing design using multidisciplinary design optimisation techniques

机译：权重建模对采用多学科设计优化技术的机翼设计结果的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Weight estimation methods are categorised in different classes based on their level of fidelity. The lower class methods are based on statistical data, while higher class methods use physics based calculations. Statistical weight estimation methods are usually utilised in early design stages when the knowledge of designers about the new aircraft is limited. Higher class methods are applied in later design steps when the design is mature enough. Lower class methods are sometimes preferred in later design stages, even though the designers have enough knowledge about the design to use higher class methods. In high level multidisciplinary design optimisation (MDO) fidelity is often sacrificed to obtain models with shorter computation times. There is always a compromise required to select the proper weight estimation method for an MDO project. An investigation has been performed to study the effect of using different weight estimation methods, with low and medium levels of fidelity, on the results of a wing design using multidisciplinary design optimisation techniques. An MDO problem was formulated to design the wing planform of a typical turboprop and a turbofan passenger aircraft. The aircraft maximum take-off weight was selected as the objective function. A quasi-three-dimensional aerodynamic solver was developed to calculate the wing aerodynamic characteristics. Five various statistical methods and a quasi-analytical method are used to estimate the wing structural weight. These methods are compared to each other by analysing their accuracy and sensitivity to different design variables. The results of the optimisations showed that the optimum wing shape is affected by the method used to estimate the wing weight. Using different weight estimation methods also strongly affects the optimisation convergence history and computational time.
机译：权重估算方法根据其保真度分为不同类别。较低级别的方法基于统计数据，而较高级别的方法使用基于物理的计算。当设计人员对新飞机的知识有限时，通常在早期设计阶段就使用统计权重估算方法。当设计足够成熟时，将在以后的设计步骤中应用高级方法。尽管设计人员对设计有足够的了解，可以使用更高级别的方法，但在以后的设计阶段有时还是首选低级别的方法。在高级多学科设计优化（MDO）中，通常会牺牲保真度来获得计算时间较短的模型。为MDO项目选择正确的权重估算方法总是需要做出折衷。已经进行了一项研究，以研究使用低和中等保真度的不同重量估计方法对使用多学科设计优化技术的机翼设计结果的影响。制定了MDO问题来设计典型涡桨飞机和涡扇客机的机翼平面图。选择飞机的最大起飞重量作为目标函数。研制了准三维空气动力学求解器，以计算机翼的空气动力学特性。五种不同的统计方法和一种准分析方法被用来估计机翼的结构重量。通过分析它们对不同设计变量的准确性和敏感性，将这些方法相互比较。优化结果表明，最佳机翼形状受估算机翼重量的方法影响。使用不同的权重估计方法也会极大地影响优化收敛历史和计算时间。

著录项

  • 来源
    《The Aeronautical Journal》 |2013年第1195期|871-895|共25页
  • 作者

    J. Mariens; A. Elham; M. J. L. van Tooren;

  • 作者单位

    Faculty of Aerospace Engineering Delft University of Technology The Netherlands;

    Faculty of Aerospace Engineering Delft University of Technology The Netherlands;

    Faculty of Aerospace Engineering Delft University of Technology The Netherlands;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号