...
首页> 外文期刊>The Aeronautical Journal >Non-linear analysis of stall flutter based on the ONERA aerodynamic model
【24h】

Non-linear analysis of stall flutter based on the ONERA aerodynamic model

机译:基于ONERA空气动力学模型的失速颤振非线性分析

获取原文
获取原文并翻译 | 示例
           

摘要

This paper presents a simple and efficient way of calculating stall flutter using the ONERA aerodynamic model. At first, the model is presented along with a solution technique based on the harmonic balance method. The parameters of the model are estimated using data either from experiments or CFD calculations and optimised using the Levenberg-Marquardt algorithm. The aerodynamic model is then coupled with a structural one using the Rayleigh-Ritz formulation and a solution technique is devised based on the Newton-Raphson method. Finally the model is used to 'fit' aerodynamic loads of oscillating aerofoils generated using CFD. The aeroelastic analysis of a helicopter blade is finally undertaken using material properties found in the literature. The model appears to be robust and efficient and able to fit the unsteady aerodynamics of various cases. The proposed aeroelastic analysis was also found to be efficient and capable of providing adequate results for preliminary analysis of stall flutter.
机译:本文提出了一种使用ONERA空气动力学模型计算失速颤动的简单有效方法。首先,将模型与基于谐波平衡法的求解技术一起提出。使用来自实验或CFD计算的数据估计模型的参数,并使用Levenberg-Marquardt算法进行优化。然后使用瑞利-里兹公式将空气动力学模型与结构模型耦合,并基于牛顿-拉夫森方法设计了一种求解技术。最后,该模型用于“拟合”使用CFD生成的振荡翼型的气动载荷。最后,利用文献中发现的材料特性对直升飞机叶片进行了气动弹性分析。该模型看起来既健壮又高效,并且能够适应各种情况下的不稳定空气动力学。还发现拟议的气动弹性分析是有效的,并且能够为失速颤振的初步分析提供足够的结果。

著录项

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