The Impact of the Aerogun Recoil Test Bench Stiffness on the Test Precision

Abstract:

The recoil of airborne machine gun affects the safety of aircrafts. In order to improve the test precision of the aerogun recoil and evaluate the performance and airborne security air guns more reliable, a certain type of recoil test bench of airborne launcher was selected as the research object, and use the analytical software—ANSYS to build the finite element model which is under impact load of the recoil test scaffolding. It is concluded that increasing the stiffness of the recoil test bench is conductive to improve the measurement precision of recoil by analyzing the influence of different stiffness of the test bench on the recoil response. In this paper, an improved design method was proposed to raise the stiffness of test as the natural frequency of existing test bench is low. The modal analysis show that the first natural frequency of modified test bench increases from 10.89 HZ to 100.57 HZ, beneficial to improving the test accuracy of recoil.

• Periodical: Advanced Materials Research (Volume 1055)
• Pages: 206-212
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1055.206
• Online since: November 2014
• Authors: Chang An Di*, Song Song Xue, Da Jian Che
• Keywords: Air Gun, Modal Analysis, Recoil, Stiffness, Test Bench

References

[1] Zhou Changxin, Xu Baoqing, Wang Zhengshi. The study of error source of influencing solid rocket motor thrust misalignment characteristics. Journal of Nanjing University of Science and Technology, 1998, 22 (4): 293 - 296.

[2] Sui Baoyuan, Xing Qin, Zhang Jun. Development of static calibration apparatus of small power rocket motor thrust measurement. Journal of Dalian University of Technology, 2009, 49 (4): 526 - 530.

[3] Wang Fangming, Lu Jiapeng, Li Defen. The impact of support frame stiffness on test accuracy of the weapon recoil. Journal of Vibration Measurement & Diagnosis, 1992, 12 (3): 30 - 34.

[4] Zhang Qingming, Wu Xiaosong, Wang Dong. Rocket thrust misalignment characteristics. Journal Of Nanjing University of Science and Technology, 2005, 29 (3): 257 - 259.

[5] Yao Yangwu. Study on the measure technology of recoil force for mounted weapon. Journal of Test and Measurement Technology, 2010, 24 (2): 124 - 127.

[6] Matthew J. Hall. Measuring felt recoil of sporting arms. International Journal of Impact Engineering, 2008, 35: 540-548.

DOI: 10.1016/j.ijimpeng.2007.03.007

[7] Liu Zhen, Dai Jinsong, Wang Maosen. The controlling for the recoil force of high firing rate automatic gun. Journal of Gun Launch & Control, 2011, 2: 1 - 4.

[8] Du ping'an, Gan E'zhong, Yu Yating. Finite Element Method - Theory Modeling & Application. National defense industry press, (2004).