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首页> 外文期刊>Journal of defense modeling and simulatio >Dynamic response for shock loadings and stress analysis of a trajectory correcting fuse based on fuse-projectile-barrel coupling
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Dynamic response for shock loadings and stress analysis of a trajectory correcting fuse based on fuse-projectile-barrel coupling

机译：基于熔体-弹壳耦合的轨迹修正熔丝的冲击载荷动态响应和应力分析

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摘要

This paper creates a fuse–projectile–barrel coupling model and conducts an implicit–explicit sequential finite element dynamic simulation to analyze the response of the components in ammunition to shock loadings during the whole launch process accurately. The engraving process continues at 3.05 ms and leads to the acceleration fluctuation of the fuse bearings. The deflection of the gun barrel due to gravity at 52 degrees quadrant elevation (QE) is acquired. Then the displacement and velocity of the projectile are obtained to verify the gun tube deflection. The bearing axial and radial acceleration in the fuse are depicted. The results indicate that the axial acceleration imposed on the bearings during launch is a major loading, and base pressure and pressure dissipation result in shock loadings on the bearings. The accelerated spin and collision of the projectile with the barrel produce centrifugal inertia force and gyroscopic coupling, which influence the radial acceleration. In addition to this, a calculation method is proposed to work out the maximal contact stress of the bearing’s components. The method is combined with the bearings’ components maximal acceleration from simulation. The results of the research prove that the calculation method is correct and credible. The research conclusions provide some reference for the structural design of a trajectory correcting fuse.
机译：本文创建了一个保险丝-弹丸-枪管耦合模型，并进行了隐式-显式的顺序有限元动态仿真，以准确分析弹药中各成分在整个发射过程中对冲击载荷的响应。雕刻过程以3.05 ms的时间继续进行，并导致保险丝轴承的加速度波动。获取了由于重力在52度象限高程（QE）引起的枪管偏转。然后获得弹丸的位移和速度，以验证枪管的偏转。示出了保险丝中的轴承轴向和径向加速度。结果表明，在启动期间施加在轴承上的轴向加速度是主要载荷，而基本压力和压力耗散会导致轴承受到冲击载荷。弹丸与枪管的加速旋转和碰撞会产生离心惯性力和陀螺耦合，从而影响径向加速度。除此之外，还提出了一种计算方法，以计算出轴承部件的最大接触应力。该方法与仿真中轴承的最大加速度相结合。研究结果表明，该计算方法是正确可靠的。研究结论为弹道校正保险丝的结构设计提供了参考。

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