高速双轨橇车用固体火箭发动机动力学分析

Dynamic Analysis of Solid Rocket Engine for High Speed Double Track Sled

应用Solidworks软件建立了某型制式固体火箭发动机整机模型对发动机进行模态分析,以高速双轨橇车运行时橇车振动强度和发动机内压为载荷,对发动机进行瞬态动力学分析。结果表明:某型制式固体火箭发动机一阶固有频率为143.8 Hz,最大弯曲应力为565.5 MPa,最小安全系数为1.4,满足高速双轨橇车安全使用要求。

The dynamic analysis of solid rocket engine for high speed double track sled was carried out in view of the strong vibration of the sled.Solidworks software has established a model of a certain type of solid rocket engine,which conducted modal analysis of the motivation,and carried out transient dynamics analysis of the engine with the vibration strength and internal pressure of the sled as the load during the operation of a high-speed double track sled.The results show that the first order natural frequency of a certain type of solid rocket engine is 143.8 Hz,the maximum bending stress is 565.5 MPa,and the minimum safety factor is 1.4,which satisfies the requirements for the safe use of high-speed double track sled.