中文摘要：

火箭弹起始扰动仿真与测试是进行多管火箭动力学分析的关键。应用多体系统传递矩阵法和发射动力学理论，建立了多管火箭发射动力学仿真系统，数值仿真获得了某多管火箭动力响应、管内运动规律。研制了基于光学杠杆的起始扰动测试系统，并进行了大口径火箭弹起始扰动测试试验，获得了某火箭弹起始扰动测试结果。仿真与试验结果吻合较好，验证了理论、仿真和测试技术的正确性，为控制多管火箭起始扰动，提高射击密集度提供了关键技术支撑。

英文摘要：

The simulations and tests for initial disturbances of rocket are the key to analysis dynamic behaviors of Multiple Launch Rocket System （MLRS）. The simulation system of launch dynamics for MLRS was developed using transfer matrix method of multi-body system and the theory of launch dynamics. The dynamical responses of multiple launch rocket and its motion patterns within the barrel were simulated. Test system for initial disturbances using new optical lever was developed, and the initial disturbances of big caliber rocket were firstly tested in China. The simulations and test results are in good agreement, which validates the correctness of the theory, simulation, test and measurement techniques. The key technology to improve firing dispersion of MLRS by controlling initial disturbances is presented.