Comparative Analysis of Computational Methods for Limit-Cycle Oscillations
Comparative Analysis of Computational Methods for Limit-Cycle Oscillations
复制标题
极限环振荡计算方法的比较分析
DOI：
10.2514/6.2006-2076
复制
发表时间：
2006
期刊：
影响因子：
2.5
通讯作者：
A. Jameson
中科院分区：
文献类型：
--
作者：
A. Gopinath;P. Beran;A. Jameson
研究了求解自治系统时周期解的各种方法。这项工作的目的是阐明方法的能力和局限性，包括作为工作的一部分开发的一种新方法，不基于时间积分，用于极限环振荡（LCO）的快速计算。讨论将集中在方法学、稳健性、准确性和频率预测上。给出了两个简化模型问题的结果，其中LCO过程中的时间离散误差取为机器零。一种是典型的具有非线性结构耦合的翼型截面，另一种是高速流动中的非线性面板。对LCO过程中尖锐瞬变的处理也进行了讨论。
Various methods are explored in the computation of time-periodic solutions for autonomous systems. The purpose of the work is to illuminate the capabilities and limitations of methods, including a new method developed as part of the work, not based on time integration, for the fast computation of limit-cycle oscillations (LCO). Discussion will focus on methodology, robustness, accuracy, and frequency prediction. Results for two simplified model problems are presented in which temporal discretization errors during LCO are taken to machine zero. One, a typical airfoil section with nonlinear structural coupling and the other, a nonlinear panel in high speed flow. Treatment of sharp transients during LCO is also discussed.