Optimal Structural Modifications of a Gun Tripod for Desired Natural Frequencies

作     者：王建中 周亚明 朵英贤 

作者机构：State Key Laboratory for the Prevention and Control of Explosion Disasters Beijing Institute of Technology Beijing100081 China Beifang Machinery and Electrical Research Institute Beijing102202 China 

出 版 物：《Journal of Beijing Institute of Technology》 (北京理工大学学报（英文版）)

年 卷 期：2004年第13卷第1期

页      面：48-53页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0826[工学-兵器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：SponsoredbytheMinisterialLevelFoundation( 2 1B2 13 ) 

主　　题：sensitivity analysis structural modification natural frequencies tripod 

摘      要：Sensitivity analysis and structural modification techniques are used to investigate the structural modifications of a machine gun tripod which suffers from severe vibration during firing due to the resonance. The finite element analysis and modal test techniques are used to determine the natural frequencies of the machine gun. The sensitivities of natural frequencies with respect to the structural parameters of the tripod are obtained by the method of sensitivity analysis, and they can be used as an indication for the structural modification of the tripod so as to shift the natural frequencies effectively. By the structural modification techniques, finally, the optimal structural modifications of the tripod for desired natural frequencies are made to avoid the resonance, and this optimal structural modification is verified by re-analysis of the modified structure and the vibration contrast between original structure and modified structure. The research resulted in a successful structural modification for desired natural frequencies, which can avoid the resonance and thereby greatly improve the shooting precision of the machine gun during firing.