The numerical model of interaction between sporting rifle bullet and tube is established to study the vibration rule of muzzle which is influenced by the change of tube structure parameters. The bore pressure measurement experiment is conducted using pressure test system. The muzzle vibration rule at vertical direction during launching process is captured using high-speed photography equipment,and the correctness of model are verified by comparing measured data and numerical results. The establishment of numerical model provides theoretical basis for researching the effect of parameters on muzzle vibration and calculation results have certain significance to engineering practices.%为研究身管结构参数变化对运动步枪枪口振动的影响规律,采用非线性有限元方法建立了运动步枪弹/枪相互作用数值计算模型.借助压力测试系统对运动步枪进行了膛压测试试验;使用高速摄影设备实测了枪口在发射过程中竖直方向的振动规律,通过对比枪口实测数据与数值计算结果验证了模型的正确性.数值模型为研究参数变化对枪口振动的影响提供了理论基础,研究结果对工程实践具有一定实际意义.
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