某型号火箭发射车动力学仿真分析与优化设计

【作者】 邓镜勇；

【导师】 王皓； 谢仕良；

【作者基本信息】 电子科技大学 ， 机械工程， 2009， 硕士

【摘要】 提高火箭武器射击密集度和机动性,是现代战争的需求,也是今后火箭武器研发的发展趋势。动力学仿真是提高火箭武器射击密集度的一种重要技术途径,结构优化是提高火箭武器机动性的重要方法。本文对某火箭发射车发射过程进行了动力学仿真分析,对发射过程关键部件瞄准机的动力学情况进行了分析,应用有限元分析方法对瞄准机进行了有限元分析,对结构进行了优化研究。本文以多体动力学和结构有限元理论和方法为核心,主要做了以下工作:建立了某自行火箭发射车全炮三维实体模型,为建立该火箭发射车系统的动力学等效模型提供了必要条件,进行了发射动力学仿真,得到了贮运发射箱端口的振动线速度和线加速度曲线,获得了火箭弹运行速度变化趋势,为评价火箭武器系统密集度提供了数据。用动力学仿真方法和经典力学理论方法分别计算了发射车稳定性,用经典力学理论方法对模型正确性进行了校验。输出了该火箭发射车瞄准机在发射状态下的载荷,为有限元分析和结构优化提供了必需的数据。建立了该火箭发射车瞄准机的有限元模型,分为24°和57°两种工况,对模型进行了有限元强度分析,得出了关键部位的变形和应力值,对其应力和变形分布有了具体的了解。运用经典力学分析方法对瞄准机变形对射角变化影响情况进行了分析,结果表明瞄准机变形对射角的影响较小。运用结构有限元理论和方法,对瞄准机的结构进行了优化设计,对优化前后两种发射工况的最大变形进行了比较分析,分析结果表明,对该部件的优化是比较成功的。本文的研究结果对今后的火箭发射车武器系统的动力学仿真分析和结构化研究有一定的参考意义。更多还原

【Abstract】 To improve the firing dispersion and the flexibility of the weapon is the need of modern war and the development trend of the weapon investigation. Dynamic simulation is a very important way to improve firing dispersion and structure optimization is the mostly way to improve the flexibility. By the dynamics simulation of one lunch truck’s firing process. According the load’s analysis of the collimation body, its intensity and rigidity and displacement is analyzed with finite element method, and its structure optimization has been done.This paper, which focused on the theory and method of the multi-body dynamics and structure optimization, has finished such studies as follows:The three dimension model has been built, which provide the necessary conditions for the building of the dynamics equivalent model. The vibration velocity and acceleration of the storage-transportation-launch case by the firing dynamics simulation, which provide the necessary data to estimate the firing dispersion.Launch stability has been got with multi-body dynamic simulation , the result of the simulation is consistent with that obtained from the traditional programming ways.The loads of the collimation body when launch were exported to provide necessary data for the finite element analysis and the structure optimization.Detailed finite element has been established .By the finite element analysis of the model in 24°and 57°conditions, the displacement and the stress have been got, which make us know the distributing of the stress and the transmogrification of the part.The effect of structure’s deformation on angle of fire has been studied by using classical dynamics, the results show that the effects is smallness.Local Optimization has been done where the largest stress concentration in. The results show that the optimization on the part is successfully.The result of this paper has a certain extend reference meaning for the reduce weight of the rocket weapon system for the future.更多还原