关键词: 固体推进剂火箭发动机;推进剂药柱;应变测量

Abstract: The strain induced in grain of motor during the process of curing cool down is measured with bow-shaped strain transducer, and testing results are compared with theoretical calculation results. It is indicated that the testing results and calculation results are in accord with each other in qualitative analyses. Since the temperature is not controlled quite strictly, there are some errors between the two results. However, when the temperature is in equilibrium at last, the testing results are in accord with the calculation results better.The measuring method for solid rocket motor’S strain is the latest one in our country, this testing system has some advantages and good appalication prospect.

Key words: Solid propellant rocket engine;Propellant grain;Strain measurement