在不同的预设角度和频率比下,在一个失速浮动气弹性系统中进行分叉和同步分析
Sourabh Kumar1, J Venkatramani2, Ankit Gupta3
1Department of Mechanical Engineering, Shiv Nadar Institution of Eminence, Delhi- NCR, Gautam Buddha Nagar, 201314, India.
Scientific reports
|September 26, 2025
概括
这项研究探讨了空气弹性系统中的非线性停机动,揭示了撞击角度和频率比如何影响分叉和同步. 这些发现为设计先进的气弹性结构提供了关键的见解.
科学领域:
- 航空弹性 航空弹性
- 非线性动力学是一种非线性动力学.
- 流体结构相互作用 流体结构相互作用
背景情况:
- 非线性停机动是空气弹性的一个关键现象.
- 了解分叉和同步是预测和控制空气弹性行为的关键.
- 之前的研究还没有系统地探索这些动态在各种各样的参数.
研究的目的:
- 实验性地研究在具有非线性失速动的气弹性系统中的分叉特征和同步机制.
- 分析预设的冲击角和频率比对空气弹性反应的影响.
- 为设计先进的气弹性结构提供洞察力.
主要方法:
- 风洞实验是在NACA 0012飞翼机上进行的,该飞翼机具有结构和空气动力学非线性.
- 通过在不同的预设角度和频率比率上系统变化的流速来确定分支路线.
- 分析了俯冲和俯冲的气弹性反应,以确定霍夫分叉和同步开始.
主要成果:
- 观察了改变的分叉场景,显示了亚临界度的变化,降低了亚临界状态和更低的飞速度.
- 对于特定的发生角度,发现了和沉降反应之间的强合,而在不同的角度发生了低振幅极限周期振荡 (LCOs) 的异步模式.
- 在异步模式下,高频组件保持同步,而低频组件呈现间歇相位同步.
结论:
- 这项研究系统地研究了在非线性停机动下在气弹性系统中的分叉和同步.
- 研究结果表明,冲击角和频率比对系统动态有很大的影响.
- 这项研究为设计更安全,更高效的气弹性结构提供了必要的实验数据.
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