低速风洞模型振动主动控制仿真研究

摘要

风洞试验模型的振动对数据精准度具有较大影响，特别是在大迎角试验状态下模型的振动甚至危害到了试验的安全性。为了提高试验数据的精准度，保障试验安全性，有必要采取措施控制风洞试验中的模型振动。针对中国空气动力研究与发展中心4m×3m低速风洞尾撑装置的特点，制定了两种振动主动控制方案，并对控制方案进行了有限元仿真验证。采用ANSYS软件对4 m ×3 m风洞尾撑装置进行了有限元建模，在此基础上进行了模态分析，获得了尾撑装置的固有频率及振型等动力学特征。进而采用APDL编程语言，基于平滑预测策略对主动控制过程进行了动力学对比分析。仿真分析表明，所提出的4m×3m风洞尾撑装置主动控制方案具有良好的抑振效果。%The model vibration has great impact on the accuracy of wind tunnel test,and it also harms the safety, especially,under the state of big attack angle.Two active vibration control schemes were proposed for a 4m ×3m low speed wind tunnel in China aerodynamics research and development center.The finite element method was used to analyze the efficiency of the methods.A finite element model was established for the sting supporting system of the 4m ×3m wind tunnel.Then the modal analysis was conducted to get the natural frequencies and vibration modes.By using the APDL program language,the active control process was simulated under the scheme of smoothing and forecasting.The results implied that the two active vibration control methods proposed for the 4m ×3m low speed wind tunnel are both effective.