航炮冲击波作用下的直升机模拟台架数值仿真  

Numerical simulation of helicopter simulation platform under the action of aerial gun shock wave

作　　者：查建平[1] 陈英华 朱帅 ZHA Jianping;CHEN Yinghua;ZHU Shuai(Chinese Helicopter Research and Develpoment Institute,333001 Jingdezhen,China)

机构地区：[1]中国直升机设计研究所,景德镇333001

出　　处：《应用力学学报》2022年第4期627-632,共6页Chinese Journal of Applied Mechanics

基　　金：基础加强研究项目(No.KT/JC/HPJC-2020)。

摘　　要：直升机航炮在发射时形成的强烈冲击波不仅对周边结构构成损伤,产生的炮振环境还会导致附近设备的失效和损坏,航炮的机弹相容设计一直是武装直升机研制过程中的难点问题。本研究基于经典的爆炸力学理论和某航炮地面靶试实测结果,对炮口冲击波形成的压力场进行了数值拟合,同时考虑冲击波正压时间的差异性,分别建立了超压分布的空间场与时间脉冲场。根据模拟台架与航炮的结构方案,在有限元软件中对炮口冲击波形成的超压扩散过程进行了模拟,然后利用非线性瞬态分析方法,对直升机模拟台架在超压作用下的冲击过程进行了仿真,分析了台架蒙皮、骨架以及连接结构的动态响应变化规律,可以为地面台架的尺寸设计和结构优化提供依据。The strong shock wave generated by the helicopter gun during launch not only damages the sur-rounding structure,but also causes the failure and damage of nearby equipment,the compatibility design of aerial gun with projectile is always a difficult problem in the development of armed helicopter.Based on the classical theory of explosion mechanics and the measured results of an aerial gun ground target,the pressure field generated by the muzzle shock wave is simulated numerically,and the difference of the time of the positive pressure of the shock wave is considered,the space field and time pulse field of overpressure distribution are established respectively.According to the structure scheme of the simulation platform and the aerial gun,the overpressure diffusion process of the muzzle shock wave is simulated in the finite element software,and then the nonlinear transient analysis method is used,the impact process of helicopter platform under overpressure is simulated,and the dynamic response of skin,frame and connecting structure is analyzed,which can provide reference for the design and structure optimization of ground platform.

关 键 词：航炮 冲击波 直升机 地面台架 数值仿真 

分 类 号：V214.1[航空宇航科学与技术—航空宇航推进理论与工程]