摘要
Recently,the first booster of the LM-7 rehearsal rocket entered the vibration tower of the Beijing Institute of Structural and Environmental Engineering located in Tianjin,marking the beginning of the LM-7 integrated modal test,which is the last large test before its maiden flight.In July,the modal test of the LM-7core stage completed at the Beijing Institute of Structural and Environmental Engineering with the hoisting out of the vibration tower of the core stage.Dur-
Recently, the first booster of the LM-7 rehearsal rocket entered the vi- bration tower of the Beijing Institute of Structural and Environmental Engineering located in Tianjin, marking the beginning of the LM-7 integrated modal test, which is the last large test before its maiden flight.
