超音速火箭弹激光引信气动热特性仿真研究  

Simulation to thermal characteristic of laser fuze on supersonic rocket

作　　者：娄文忠[1] 刘爱丽[1] 秦跃[1] 

机构地区：[1]北京理工大学宇航科学技术学院,北京100081

出　　处：《红外与激光工程》2008年第4期671-674,共4页Infrared and Laser Engineering

基　　金：武器装备预研基金资助项目(9140A0504307)

摘　　要：激光引信具有抗无线电干扰能力强,测距精度高、波束窄,引战配合效率高等突出优点,成为继无线电引信之后的重要引信种类。首先分析了超音速火箭弹激光引信的结构,重点研究了在超音速飞行条件下火箭弹激光引信气动热特性,采用有限元方法对火箭弹弹头引信建立了模型并对其气动热特性进行了仿真,在此基础上得出了重要结论,在激光引信设计中,不仅要考虑光学窗口的透光性能,还应高度重视其热变化特性对强度带来的影响。Laser fuze is the most important part on supersonic rocket with the obvious advantages of the capability of anti-jamming,the high precision measurement,the narrow light beam,and the high compatible capability with other munitions,but it must work in harsh environment,such as high temperature,high shock etc. In order to protect laser fuze ,especially for its optical window,research on thermal characteristic of laser fuze is very important. Firstly,according to the demand of the system,the structure of laser fuze in supersonic rockets was described,the thermal model was set up,all heat sources of supersonic rockets were analyzed in working condition,and the 16 key points of optimized model for thermal characteristic analysis were set up as well. Based on the principle of caloric balance for rocket ,the trajectory model and the relationship between the thermal and trajectory models were set up. The finite element method was adopted to build a model for the supersonic rocket laser fuze and complete thermal characteristic simulation successfully. On the basis of simulation,the surface temperature charts at eight time points,the function curve of rocket speed versus time and fuze surface temperatures were obtained.It is concluded that the influence of pneumatic caloric on the intensity of optical window should be considered as well as transmission characteristic of optical window.

关 键 词：火箭弹 激光引信 热特性仿真 有限元方法 

分 类 号：TJ430.1[兵器科学与技术—火炮、自动武器与弹药工程]