静力试验位移测量异常原因分析及推算方法研究

分析了发动机机架静力试验过程中某重要位移测点出现位移测量异常的原因，提出了几点改进措施，包括打磨接触面、采用粘贴面积较大的测量块等；另外，考虑到此次静力试验其余测点位移正常、试验过程结构和加载稳定，通过结构整体刚度分析，提出一种利用正常测点来推算异常测点位移的方法，采用两次未出现测量异常的抽检静试数据对此推算方法进行验证，分析推算值与测量值之间的误差，结果表明，这种理论推算方法的推算误差小于5％。

Cause analysis and computative method of displacement measurement abnormality in static test

The reason of abnormality appeared during the displacement measurement in the flame static test is analyzed. Some improvement approachs are put forward, including more smoother contact surface, bigger measuring block and so on. Based on the analysis of the stiffness of the whole flame, the derivation method for calculation the displacement of an abnormal measuring point by us- ing the normal measuring points is proposed. The method is validated by additional two tests which do not contain abnormal displacement measuring points. The results show that the error of the computative method is less than 5 %.