摘要
选取某航空活塞发动机的两桨叶定距螺旋桨为分析对象,基于通用有限元软件平台建立螺旋桨整体结构、单个桨叶结构的三维有限元模型。根据航空活塞动力装置性能参数,计算出螺旋桨在地面起飞状态下受到的气动、离心载荷,再利用有限元软件计算了螺旋桨整体结构、单个桨叶结构在无外载荷作用下的、只有气动载荷作用的、只有离心载荷作用的、气动和离心载荷同时作用的自振频率和振型。通过对计算结果的分析,发现了气动载荷、离心载荷、形状(整体或单个桨叶)因素对频率、振型的影响规律,对其他与气体有相互作用的旋转部件的振动特性计算和分析具有重要的指导意义。
A two-blade fixed pitch propeller of an aero-piston engine was selected as the analysis object.On a general finite element software platform,two 3D finite element models of the integral structure and the single blade structure of the propeller were established.According to the performance parameters of the aero-piston power plant,the aerodynamic and centrifugal loads on the propeller under the ground take-off condition were calculated.In addition,by using the finite element software,the natural frequencies and modes of the integral structure and the single blade structure of the propeller under the actions of non-external load,aerodynamic load only,centrifugal load only,and both aerodynamic and centrifugal load were calculated.Results show that the influences of aerodynamic load,centrifugal load,and shape factor(integral structure or single blade structure)on the vibration frequency and the mode were elucidated.The results shall have important guiding significance for the calculation and analysis of vibration characteristics of other rotating parts that interact with gas.
作者
魏武国
WEI Wu-guo(Aviation Engineering Institute,Civil Aviation Flight University of China,Deyang 618307,China)
出处
《科学技术与工程》
北大核心
2020年第13期5396-5402,共7页
Science Technology and Engineering
基金
四川省教育厅2018年自然科学一般项目(18ZB0684)
中国民用航空飞行学院2018年面上项目(THZX2018-07)
中央高校2019年教育教学改革专项(E2019017)。
关键词
航空螺旋桨
振动特性
影响因素
反对称模态
有限元分析
aero propeller
vibration characteristics
influence factors
anti-symmetric modes
finite element analysis
