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利用机械系统动力学仿真分析软件ADAMS进行延伸喷管展开动力学仿真,在已知延伸喷管结构尺寸、各部件质量特性、作动筒内压力及各种展开阻力的条件下,计算了延伸锥展开位移、速度和加速度。并与试验结果比较,两种结果接近。对计算结果分析得知,在保证展开时间满足要求的前提下,适当降低展开速度并尽可能匀速展开,可以减小展开过程中延伸锥与基础喷管之间的撞击力;为了保证展开可靠性,作动筒的展开力应有一定持续时间,尽量避免出现压力峰后压力突降。对固体火箭发动机延伸喷管设计与研究具有重要意义。
Using the mechanical system dynamics simulation software ADAMS to carry out the extended nozzle expansion dynamics simulation, the extension cone is calculated under the condition of the known extension nozzle structure size, the quality characteristics of each component, the inner pressure of the actuator and various deployment resistances. Expand the displacement, speed and acceleration. And compared with the test results, the two results are close. The calculation results show that, to ensure that the deployment time to meet the requirements of the premise, appropriately reduce the deployment speed and as uniform as possible to expand, can reduce the process of expansion cone and the basic nozzle between the impact; in order to ensure the deployment of reliability , The actuating force of the cylinder should have a certain duration, try to avoid pressure drop after the peak pressure. It is of great significance to design and research the extended nozzle of solid rocket motor.