摘要
为研究闭锁块及闭锁槽关键受力部位结构对应力分布的影响及机心结构设计的合理性,建立了节套和机心有限元模型并进行强度计算,根据结果对关键受力部位提出结构改进方案,对改进后的结构进行强度分析,得到关键受力部位结构应力分布规律,再对应力集中程度最小的结构进行疲劳寿命分析。研究结果表明:部件最大应力随着闭锁槽、闭锁块圆角半径的增大和两圆角之间间隙的增大而减小;应力集中程度最小的结构相比原结构,其节套闭锁槽最大应力减小17.62%,闭锁块最大应力减小16.61%;节套和机心最小寿命均超过了1.5×106次,节套和机心寿命较小的部位也是强度分析中应力集中程度较大的部位。
The structure of the key stress parts of the locking block and the locking well has an influence on the stress distribution.In order to study that influence and the rationality of the design of the breech,the finite element models of the rotor and the breech were established and the strength calculation was performed.According to the result,the structural improvement plan for the key stress part was proposed.The strength analysis of the improved structure was carried out to obtain the influence discipline of the structure of the key stress part on the stress distribution.And then the fatigue life analysis was carried out on the structure with the least stress concentration.The results show that:the maximum stress of the component decreases with the increase of the radius of the locking well and the locking block and the increase of the gap between the two fillets;for the structure with the smallest stress concentration,compared with the original structure,the maximum stress of the rotor locking well is reduced by 17.62%,and the maximum stress of the locking block is reduced by 16.61%;the minimum lifespan of the rotor and the breech have exceeded 1.5×106 times,and the parts with the shorter life of the rotor and the breech are also the parts with the greater stress concentration in the strength analysis.
作者
杨高伟
王惠源
黄少保
王志杰
YANG Gaowei;WANG Huiyuan;HUANG Shaobao;WANG Zhijie(School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China;Xi’an Kunlun Industry(Group)Co.,Ltd.,Xi’an 710000,China)
出处
《兵器装备工程学报》
CAS
北大核心
2020年第11期112-116,181,共6页
Journal of Ordnance Equipment Engineering
关键词
闭锁块偏转式机心
有限元建模
强度分析
结构改进
疲劳寿命分析
breech with tilting locking block
finite element modeling
strength analysis
structural improvement
fatigue life analysis
