摘要
为了分析大跨度柔性车架和起竖托架对车载冷发射系统动态响应的影响,满足快速化和精确化仿真的需要,针对车载冷发射系统典型结构和弹射物理过程,基于笛卡尔坐标方法描述体的运动,以适应发射车约束复杂的特点。采用浮动坐标系方法描述柔性体的变形,通过模态综合法缩减系统的自由度数,并提出采用赫兹接触模型模拟弹重的释放过程,最终建立了车载冷发射系统刚柔耦合动力学快速仿真模型。分别基于弹射模拟试验系统和实装系统对仿真模型进行了试验验证和仿真验证,并进行了车载冷发射刚柔耦合动力学响应分析。结果表明:提出的刚柔耦合仿真模型能够快速有效地分析车载冷发射弹射过程的动态响应特性,满足工程设计的需要;柔性车架模型比刚性车架模型更合理,而且弹射过程发射管口x向相图的奇异点为稳定焦点,说明车载冷发射系统能够恢复到稳定平衡状态。
In order to analyze the influences of long span flexible chassis and lifting auxiliary bracket on the dynamic response of vehicular cold launch system and meet the requirements of fast and accurate simulation,the Cartesian coordinate method is used to describe the motion of the body to fit the characteristics of complex constraints,and then the floating coordinate system method is used to describe the deformation of the flexible body,and the degree of freedom of system is reduced by modal synthesis method.The Hertz contact model is proposed to reproduce the release process of the missile weight.A rapid simulation model of rigid-flexible coupling dynamics of vehicle cold launch system is established.The simulation model is verified by the experimental results based on the launch simulation test system and the simulated results based on a real vehicular cold launch system,and then the rigid-flexible coupling dynamic response analysis is made for the vehicular cold launch system.The results show that the proposed simulation model is able to quickly and effectively analyze the dynamic responses of the launching process of vehicular cold launch systems and meet the requirements of the engineering design,and the flexible chassis model is more reasonable than the rigid chassis model.Furthermore,the singular point of phaseportrait of the canister mouth＇s x-coordinate is a stable focus during the launch process,thus indicating that the vehicular cold launch system can be restored to a stable equilibrium state.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2017年第12期2386-2394,共9页
Acta Armamentarii
关键词
兵器科学与技术
车载冷发射
刚柔耦合动力学
变拓扑系统
数值仿真
ordnance science and technology
vehicular cold launch
rigid-flexible coupling dynamics
changing topological system
numerical simulation
