为研究耳轴-轴承间接触碰撞及间隙对自行高炮行进间射击时炮口响应影响，采用基于Lankarani-Nikravesh接触碰撞理论改进的含间隙旋转铰接触碰撞力数值方法，描述不同间隙的自行高炮耳轴-轴承约束关系。利用谐波叠加法重构符合路面分级标准的不平度，考虑身管柔性建立含耳轴-轴承间隙的刚柔耦合自行高炮发射动力学模型。数值计算获得不同间隙下自行高炮行进间射击炮口动态响应，并与耳轴-轴承理想旋转铰模型对比分析。结果表明，耳轴-轴承间接触碰撞对炮口高低、方向射角影响程度不同，对方向角速度影响最明显；耳轴-轴承间隙与炮口响应并非对应的线性变化关系。
Abstract
In order to study the impact of clearance between trunnion and bearing on the muzzle response for antiaircraft gun on the move, a collision computational methodology which was improved base on Lankarani-Nikravesh law was used to describe the constraint relation between trunnion and bearing with different clearances. The flexibility of barrel was considered and the stochastic road irregularities were created by sinusoid superposition method to establish the rigid-flexible coupling dynamic model of self-propelled antiaircraft gun. According to numerical calculation, the muzzle dynamic responses for the gun firing on the move were obtained and compared with the ideal constraint model. The results indicate that the collision between trunnion and bearing have some degree impact on elevation angle and direction angle and the effect on direction angular velocity was most obvious. The results provides basis for grasping the impact rules of backlash nonlinearity for muzzle response of self-propelled antiaircraft gun on the move.
关键词
自行高炮 /
行进间射击 /
间隙 /
炮口响应 /
路面谱
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Key words
self-propelled antiaircraft gun /
fire on the move /
clearance /
muzzle response /
road spectrum
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