摘要
嵌入后退式子母弹分离过程中,当子弹的后、中吊挂脱离导轨后,子弹运动姿态受到母弹的牵连,处于半约束状态,吊挂与导轨间的接触碰撞和母弹对子弹的气动干扰对分离过程具有极大的影响。为了为嵌入后退式子母弹高速分离安全性设计提供重要的理论支撑依据,确保子母弹安全分离,提出了子母弹高速分离高精度时空数值仿真安全性评价方法。在构建子母弹分离过程变构型气动力响应面模型和变构型变质量多体动力学模型的基础上,建立了子母弹分离过程变构型变质量组合体多体-气动流固耦合高精度时空数值仿真平台。基于该模型对不同的初始边界条件的子母弹分离过程进行仿真计算,获得了子母弹分离过程中的姿态参数,可对子母弹分离安全性进行动态评估;确定了子母弹可安全分离初始边界条件,为制定有利于提高子母弹高速分离安全性的技术措施提供了量化设计依据。通过仿真算例和试验表明,所构建的子母弹高速分离高精度时空数值仿真平台具有较高的准确性和可信度,研究结果对嵌入后退式子母弹高速分离安全性评价具有非常重要的工程价值。
During the separation process of embedded-backward submunition,the bullet enters a semi-constrained state when the rear and middle hangings detach from the guideway.Therefore,the movement attitude of the bullet is significantly affected by the carrier vehicle.The contact collision between the hanging and the guideway,as well as the aerodynamic interference of the carrier vehicle on the bullet,have great influences on the separation process.In order to provide important theoretical support for the design of the submunition high-speed separation system and achieve safe separation of the submunition,a high-precision space-time numerical simulation security evaluation method of the high-speed separation for submunition were proposed.Based on the constructed aerodynamic response surface model and the variable-configuration variable-mass multibody dynamics model of the submunition,the multibody-aerodynamic fluid-structure coupling high-precision space-time numerical simulation platform for the variable-configuration variable-mass combination of the separation process for submunition was established.Different initial boundary conditions were applied to the fluid-structure coupling dynamics model and simulation was carried out to obtain the attitude parameter of the submunition separation process Then,the separation safety of the submunition dynamically evaluated,and the safety initial boundary conditions of the submunition separation was obtained.It can provide a quantitative design basis for formulating technical measures that are conducive to improving the safety of high-speed separation of submunition.Through simulation example and test,it is shown that the constructed high-precision space-time numerical simulation platform for high-speed separation of submunition has high accuracy and credibility.The research results provide important engineering value for the security design of high-speed separation for submunition.
作者
刘广
俞刘建
李微微
许斌
张保刚
葛志闪
LIU Guang;YU Liujian;LI Weiwei;XU Bin;ZHANG Baogang;GE Zhishan(Shanghai Electro-mechanical Engineering Institute,Shanghai 201109,China)
出处
《弹道学报》
CSCD
北大核心
2024年第2期82-89,共8页
Journal of Ballistics
基金
国家自然科学联合基金(U20B2007)。
关键词
子母弹
高速分离
变构型
变质量
流固耦合
安全性评价
submunition
high-speed separation
variable-configuration
variable-mass
fluid-structure coupling
security evaluation
