采用碰振吸振子的高速机翼气动弹性系统阵风响应减缓
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国防科技大学

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v215.3

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国防基础科研基金资助项目(JCKY2021205B108)


Gust Response Alleviation of Aircraft Wing Aeroelastic System in Supersonic Flow Based on Vibro-Impact oscillator
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    摘要:

    为降低高速机翼气动弹性系统的阵风响应量级,将碰振吸振子(vibro-impact oscillator)技术引入气动弹性系统。通过碰振吸振子与机翼蒙皮之间的碰撞接触,吸收及转移阵风响应能量,降低阵风响应量级,提高气动弹性系统稳定性。建立了具有碰振吸振子的机翼气动弹性阵风响应动力学模型,采用赫兹接触模型计算振子与机翼蒙皮之间的碰撞接触力,采用“1-cos”模型计算阵风速度,采用活塞理论进行计算非定常气动力。分析了具有碰振吸振子的机翼气动弹性阵风响应特性,分析表明碰振吸振子可以通过与机翼蒙皮间的碰撞,吸收转移机翼阵风响应的能量,从而达到阵风减缓的效果。探讨了碰振吸振子参数对气动弹性阵风响应减缓效果的影响规律,结果表明减小碰振刚度和减小初始间隙均可以提升气动弹性系统阵风响应减缓效果,而自振频率比需要优化选取,其存在一个最优的频率比使得系统具有较好的阵风响应减缓效果。对于碰振吸振子的安装位置,离机翼前缘较近时其阵风减缓效果更明显。

    Abstract:

    In order to reduce the gust response level of the high-speed wing aeroelastic system, the vibro-impact absorber technology is introduced into the aeroelastic system. Through the collision contact between the vibro-impact absorber and the wing skin, the gust response energy is absorbed and transferred, reducing the gust response level and improving the stability of the aeroelastic system. The dynamic model of the aeroelastic gust response for wings with a vibro-impact absorber is established. The Hertz contact model is used to calculate the collision contact force between the absorber and the wing skin, the "1-cos" model is used to calculate the gust velocity, and the piston theory is used to calculate the unsteady aerodynamic force. The aeroelastic gust response characteristics of wings with vibro-impact absorbers are analyzed. The results show that the vibro-impact absorber can absorb and transfer the energy of wing gust response through collision with the wing skin, thereby achieving the effect of gust alleviation. The influence of vibro-impact absorber parameters on the aeroelastic gust response alleviation effect was explored. The results showed that reducing collision stiffness and initial clearance can improve the aeroelastic system gust response alleviation effect. There is an optimal frequency ratio that makes the system have a better gust response alleviation effect. For the installation position of the vibro-impact absorber, its gust alleviation effect is more significant when it is closer to the leading edge of the wing.

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  • 收稿日期:2024-06-12
  • 最后修改日期:2024-10-27
  • 录用日期:2024-10-21
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