箔条云整体运动性能建模研究  

Modeling Study on Holistic Kinetic Performance of Chaff Cloud

作　　者：李志辉[1] 王鹿受 

机构地区：[1]中国空气动力研究与发展中心超高速研究所,绵阳621000 [2]试验物理与计算数学实验室,北京100076

出　　处：《系统仿真学报》2009年第4期928-931,935,共5页Journal of System Simulation

基　　金：国家自然科学基金(10321002);试验物理与计算数学实验室仿真预研课题

摘　　要：研究随机动力学理论和统计散布取样技术,建立了对飞行器抛撒"海量"箔条及形成箔条云随机统计模拟方法;使用箔条个体跨流区空气动力特性计算技术,发展飞行力学数值方法计算确定任意时刻箔条个体团飞行的空间位置、速度;研究应用随机动力学加权技术及概率统计分布原理,对箔条云整体性能进行数学建模与仿真分析。研究表明模拟仿真结果与理论预测、实验测试相吻合,提供了一条新的模拟箔条云飘落飞行覆盖范围与整体运动性能及任意时刻箔条个体空间位置、姿态、速度等联合分布技术研究途径。The statistical simulation technique in random sample for the numerous chaffs and chaff-cloud released by the aircraft was founded on the theory of stochastic dynamics and statistical diffusive sampling. Using the computational technique for the aerodynamic characteristic of chaff bodies covering various flow regimes, the numerical method of trajectory flying mechanics was studied and applied to calculate the space situation and velocity of the flying chaff groups at any time. The holistic performance of the chaff cloud was analyzed and studied in mathematical modeling and simulation by developing the weighted technique of stochastic dynamics and statistical distribution theory. As a result, the present simulating results are in good agreement with the theoretical forecast and actual flying experiment, which displays the engineering practicality and reliability of the present method in simulating the flying contrail, overcast range and holistic kinetic performance of the chaff cloud including space position, number density, flying gesture and velocity across the atmosphere inside and outside.

关 键 词：箔条云 随机动力学 空气动力学 飞行力学 统计计算 建模与仿真 

分 类 号：TJ7[兵器科学与技术—武器系统与运用工程] V119[航空宇航科学与技术—人机与环境工程]