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    • 低速全模颤振试验悬挂支撑系统

    Jianping Tang,Yuanzhi Yang,Jian Liang

    Journal of Experiments in Fluid Mechanics（2014）

    Cited 1|Views3
    Abstract
    为适应日益增多的低速风洞全模颤振试验的需要，发展颤振试验技术，在气动中心低速所3．2m 风洞建立了一套通用的悬挂支撑系统。该悬挂系统分为垂直和水平两部分，水平悬挂系统由水平钢索装置和张紧机构组成。系统可提供模型沉浮、俯仰、横侧向、偏航和滚转5个方向的自由度；可单独改变模型某一方向的自由度而不影响其它方向的自由度；可确保模型上下、左右、前后位置都处于试验段正中心；可方便地调整模型的迎角和滚转角。对采用该悬挂系统的颤振模型，文中提供了技术要求和参数选择方法。采用同一颤振模型在3．2m 风洞与TsAGI 的 T-103风洞进行了对比试验，得到的颤振临界速度、频率基本一致，证明该套悬挂系统设计合理，可以应用于低速全模颤振试验。
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    • Pretraining has recently greatly promoted the development of natural language processing (NLP)
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    【要点】：本文介绍了一种新型的浮悬悬挂系统（FSS），用于低速风洞中全尺寸模型的颤振测试，实现了模型在垂直、水平方向及俯仰、偏航、翻滚五个自由度的独立调整，验证了其在颤振测试中的有效性和可靠性。
    

    【方法】：通过设计垂直和水平两部分组成的浮悬悬挂系统，提供模型在垂直和水平方向的自由度，以及俯仰、偏航和翻滚三个旋转自由度，使模型可以在风洞测试段中心位置得到稳定支撑，并便于调整模型的攻角和滚转角。
    

    【实验】：在LSAI的CARDC风洞直径3.2m的测试段和TsAGI的T-103风洞中，使用同一颤振模型进行了对比测试，实验结果表明该浮悬悬挂系统设计合理，且在低速全尺寸模型颤振测试中表现良好，模型的临界颤振速度和频率在两种风洞测试中几乎一致。