起落架用金属关节轴承有限元分析
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摘要
以大飞机起落架用WMLS17R型金属关节轴承为研究对象,基于ANSYS Workbench建立有限元模型对3种工况下关节轴承进行静力学分析,可知:在极限载荷作用下端面沟槽底部会出现应力集中,外圈等效应力值大于材料屈服强度,会产生明显塑性变形;联合载荷下轴承最大等效应力、最大接触应力比纯径向载荷工况下要大。以外圈端面沟槽的截面形状及位置为设计变量,分析了端面沟槽结构对应力集中的影响。并考虑摩擦生热的影响,对3种工况下轴承进行了热力耦合分析,结果表明:在极限载荷下关节轴承在启动阶段会产生大量摩擦热,联合载荷工况下摩擦温升大于纯径向载荷工况,倾斜位置下摩擦温升大于正常位置情况。
Taking the metal spherical plain bearings WMLS17R for landing gear of large aircraft as research objects,the finite element model is built based on ANSYS Workbench,and the static analysis is carried out for the bearings under three operating conditions. The stress concentration appears at bottom of groove on end face under limit load,and the equivalent stress value of outer rings is greater than yield strength of material,leading to obvious plastic deformation. The maximum equivalent stress and maximum contact stress of the bearings under combined load are larger than those under pure radial load. The cross-sectional shape and position of groove on end face of outer rings are used as design variables,and the influence of structure of groove on stress concentration is analyzed. Considering influence of friction heat generation,the thermal-mechanical coupling analysis is carried out for the bearings under three operating conditions. The results show that a large amount of friction heat of spherical plain bearings is generated under limit load during starting stage,the friction temperature rise under combined load is larger than that under pure radial load,and the friction temperature rise under inclined position is larger than that under normal position.
Taking the metal spherical plain bearings WMLS17R for landing gear of large aircraft as research objects,the finite element model is built based on ANSYS Workbench,and the static analysis is carried out for the bearings under three operating conditions. The stress concentration appears at bottom of groove on end face under limit load,and the equivalent stress value of outer rings is greater than yield strength of material,leading to obvious plastic deformation. The maximum equivalent stress and maximum contact stress of the bearings under combined load are larger than those under pure radial load. The cross-sectional shape and position of groove on end face of outer rings are used as design variables,and the influence of structure of groove on stress concentration is analyzed. Considering influence of friction heat generation,the thermal-mechanical coupling analysis is carried out for the bearings under three operating conditions. The results show that a large amount of friction heat of spherical plain bearings is generated under limit load during starting stage,the friction temperature rise under combined load is larger than that under pure radial load,and the friction temperature rise under inclined position is larger than that under normal position.
引文
[1]牛春匀.实用飞机结构工程设计[M].北京:航空工业出版社,2008.
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[8]李科委,沈雪瑾,陈有光,等.基于有限元法的向心关节轴承三维力学性能分析[J].轴承,2008(6):19-22.
[9]胡宝根,王卫英,岳琳琳.基于有限元法的自润滑关节轴承静力学分析[J].轴承,2014(4):10-13.
[10] FANG X,ZHANG C,CHEN X,et al. Newly developed theoretical solution and numerical model for conformal contact pressure distribution and free-edge effect in spherical plain bearings[J]. Tribology International,2015,84:48-60.
[11] FANG X,ZHANG C,CHEN X,et al. A new universal approximate model for conformal contact and non-conformal contact of spherical surfaces[J]. Acta Mechanica,2015,226(6):1657-1672.
[12]霍亚军,尹忠慰,李虎林,等.基于ABAQUS的关节轴承径向受载试验的热力耦合分析[J].轴承,2015(1):7-11,50.
[13]段宏瑜,刘红宇,朱淋淋.基于Workbench的自润滑关节轴承失效分析及优化设计[J].轴承,2016(9):52-56.
[14]林志埙.基于有限元的不同内圈结构关节轴承径向承载分析[J].计算机辅助工程,2017,26(5):51-56.
[15] ZHAO X,FANG C,CHEN Y,et al. Failure behaviour of radial spherical plain bearing(RSPB)joints for civil engineering applications[J]. Engineering Failure Analysis,2017,80:416-430.
[2]王哲.自润滑关节轴承接触性能分析[D].秦皇岛:燕山大学,2015.
[3] GOENKA P K,BOOKER J F. Spherical bearings:static and dynamic analysis via the finite element method[J].Journal of Tribology,1980,102(3):308-319.
[4] KIM B C,DONG C P,KIM H S,et al. Development of composite spherical bearing[J]. Composite Structures,2006,75(1):231-240.
[5] KIM B C,DAI G L. Endurance and performance of a composite spherical bearing[J]. Composite Structures,2009,87(1):71-79.
[6] GERMANEAU A,PEYRUSEIGT F,MISTOU S,et al.Verification of a spherical plain bearing finite-element model using scattered light photoelasticity tests[J].Journal of Engineering Tribology,2008,222(5):647-656.
[7] GERMANEAU A,PEYRUSEIGT F,MISTOU S,et al. 3D mechanical analysis of aeronautical plain bearings:validation of a finite element model from measurement of displacement fields by digital volume correlation and optical scanning tomography[J]. Optics&Lasers in Engineering,2010,48(6):676-683.
[8]李科委,沈雪瑾,陈有光,等.基于有限元法的向心关节轴承三维力学性能分析[J].轴承,2008(6):19-22.
[9]胡宝根,王卫英,岳琳琳.基于有限元法的自润滑关节轴承静力学分析[J].轴承,2014(4):10-13.
[10] FANG X,ZHANG C,CHEN X,et al. Newly developed theoretical solution and numerical model for conformal contact pressure distribution and free-edge effect in spherical plain bearings[J]. Tribology International,2015,84:48-60.
[11] FANG X,ZHANG C,CHEN X,et al. A new universal approximate model for conformal contact and non-conformal contact of spherical surfaces[J]. Acta Mechanica,2015,226(6):1657-1672.
[12]霍亚军,尹忠慰,李虎林,等.基于ABAQUS的关节轴承径向受载试验的热力耦合分析[J].轴承,2015(1):7-11,50.
[13]段宏瑜,刘红宇,朱淋淋.基于Workbench的自润滑关节轴承失效分析及优化设计[J].轴承,2016(9):52-56.
[14]林志埙.基于有限元的不同内圈结构关节轴承径向承载分析[J].计算机辅助工程,2017,26(5):51-56.
[15] ZHAO X,FANG C,CHEN Y,et al. Failure behaviour of radial spherical plain bearing(RSPB)joints for civil engineering applications[J]. Engineering Failure Analysis,2017,80:416-430.