风洞天平装配应力分析  

Analysis of Assembly Stress of Wind Tunnel Balance

作　　者：王惠伦 解亚军[1] 

机构地区：[1]西北工业大学航空学院,西安710072

出　　处：《航空工程进展》2014年第3期364-368,共5页Advances in Aeronautical Science and Engineering

摘　　要：天平在风洞模型安装过程中由于加工误差通常会产生装配应力,对元件输出值存在干扰,影响测量准度。针对此现象,采用有限元仿真方法,在保持天平总长度不变前提下,研究不同天平元件固支端长度对装配应力带来的测量准度影响情况。结果表明:只要存在装配应力,天平测量结果就会产生变化,而元件固支端长度大小对其无明显影响。因此,在风洞天平设计或实验中,提高测量准度的方法是采取措施尽可能减小天平安装产生的附加应力,而不是改变元件固支端长度。Balance in the installation of wind tunnel model of the processing error tend to produce the assembly stress .The interference of element output value affects the accuracy of measurement .In view of this phenome-non ,using the finite element simulation method ,the influence on measurement results of different balance’s fixed end length on the assembly stress is investigated based on keeping the total length invariant .The results show that ：as long as the assembly stress exists ,balance measurement results will be influenced .But the length of fixed end has no obvious effect on this .Therefore ,methods of improving the measurement accuracy is to take actions to reduce the additional installation stress in wind tunnel balance design or experiment instead of chan-ging fixed end length of balance .

关 键 词：风洞天平 固支端长度 装配应力 有限元仿真 

分 类 号：V211.72[航空宇航科学与技术—航空宇航推进理论与工程]