Research on the Application of High-frequency Base Balance in Wind Tunnel Test

摘要：

High-frequent base balance (HFBB) was applied for the test of the three-component aerodynamic force coefficients of one streamlined bridge deck section model. Frequency spectrum analysis and digital filtering was performed for removing the inertia force caused by the vibration of the model system,by which the measurement accuracy can be improved. The torsional center eccentricity resulting from eccentric model mounting influence on torsional moment coefficient was studied. The research indicates that inertia force effect can be regarded as white noise basically,which has almost none effect on the average of the aerodynamic force,whereas it magnified the standard deviation,so the rigidity of the model should be guaranteed. The effect of vertical eccentric torsion is so small that there is no need to calculate. Nonetheless,the lateral eccentric torsion has obvious effect,which cannot be ignored Hence,the lateral eccentricity should be minimized.

关键词： high-frequency base balance wind tunnel test spectrum analysis digital filter inertia force effect eccentric torsion effect

作者: Fuyou Xu Binbin Li Zhe Zhang

作者单位: School of Civil & Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 1738-1742

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）