摘要
高推重比设计一直是航空活塞发动机技术发展的必然趋势,为提升发动机的推重比,实现减重增效,以某款二冲程水平对置航空活塞发动机高强度铝合金曲轴箱作为研究对象,根据其结构特点建立三维实体模型,利用GT-SUITE软件分析各个主轴承座的受力情况,运用有限元软件ANSYSWorkbench对曲轴箱有限元模型进行稳态静力与约束模态的求解。结果表明,在发动机最大爆发压力下,曲轴箱最大变形不大于0.1 mm,安全系数大于1.2,1阶频率为1 421.6 Hz,远高于发动机的激励频率,不存在共振现象,整体结构符合设计要求。
The design of high thrust-weight ratio has always been the inevitable trend of the development of aviation piston engine technology.In order to improve the thrust-weight ratio of the engine and realize weight reduction and efficiency increase,taking a high-strength aluminum alloy crankcase of a two-stroke horizontal opposed aviation piston engine as the research object,a three-dimensional solid model is established according to its structural characteristics,and GT-suite software is used to analyze the stress of each main bearing seat.The steady-state static and constrained models of the crankcase finite element model are solved by using the finite element software ANSYS Workbench.The results show that under the maximum explosion pressure of the engine,the maximum deformation of the crankcase is not greater than 0.1 mm,the safety factor is greater than 1.2,and the first-order frequency is 1421.6 Hz,which is much higher than the excitation frequency of the engine,there is no resonance phenomenon,and the overall structure meets the design requirements.
作者
李义
潘钟键
LI Yi;PAN Zhongjian(National Enterprise Technology Center,Sunward Intelligent Equipment Co.,Ltd.,Changsha,Hunan,410100,China;School of Mechanical and Electrical Engineering,Changsha University)
出处
《小型内燃机与车辆技术》
CAS
2023年第2期46-50,共5页
Small Internal Combustion Engine and Vehicle Technique
基金
湖南省重点研发计划项目2021wk2007
湖南创新型省份建设专项2022GK1070
湖南省科技创新计划项目2021GK1020。
关键词
水平对置
航空活塞发动机
有限元法
模态分析
Horizontal contraposition
Aviation piston engine
Finite element method
Modal analysis
