CAJ | 학술논문

弹丸发射过程中身管的振动对射击精度有很大影响，为了掌握身管振动的规律，将身管简化为悬臂梁模型，在此基础上建立了身管横向振动方程，运用模态分析法求解系统动力响应。针对某火炮不同装药量身管振动进行了数值仿真，对不考虑膛内气体对身管作用和考虑膛内气体对身管作用两种情况进行了比较。求解过程中弹丸的位移、速度和加速度均为实际数据。结果表明，静扰度对身管的振动特性有很大影响，静扰度为0时，弹丸初速越高，弹丸出炮口阶段炮口振动幅度越小，膛内气体对身管的作用力能有效减小发射期间身管的振动幅度。
탄환발사과정중신관적진동대사격정도유흔대영향，위료장악신관진동적규률，장신관간화위현비량모형，재차기출상건립료신관횡향진동방정，운용모태분석법구해계통동력향응。침대모화포불동장약량신관진동진행료수치방진，대불고필당내기체대신관작용화고필당내기체대신관작용량충정황진행료비교。구해과정중탄환적위이、속도화가속도균위실제수거。결과표명，정우도대신관적진동특성유흔대영향，정우도위0시，탄환초속월고，탄환출포구계단포구진동폭도월소，당내기체대신관적작용력능유효감소발사기간신관적진동폭도。
The vibration of barrel has considerable influence on firing accuracy. To obtain the law of the barrel vibration, the barrel is considered as a cantilever in this paper, then its transverse vibration equation is established and the force response can be figured out by using modal analysis method. The vibration characteristics of the barrel are numerical y simulated for different charge weight, besides, two situations the barrel with or without gas pressure are compared. ln solving process, the displacement, velocity and ac-celeration of projectile are real datum. The simulation results indicate that static offset affects the vibration characteristics very much. The higher rprojectile′s initializing speed is, the smal er amplitude of the barrel′s vibration and effect of gas pressure are, which can decrease the amplitude of vibration considerably.