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大型飞机气动载荷向有限元节点等效分配的方法
引用本文:张建刚,孙仁俊,唐长红.大型飞机气动载荷向有限元节点等效分配的方法[J].力学与实践,2017(1):25-29.
作者姓名:张建刚  孙仁俊  唐长红
作者单位:中国航空工业集团公司第一飞机设计研究院,西安,710089
摘    要:将气动载荷分配到有限元节点上是工程实际中的一项重要而繁琐的工作.对于二维的翼面气动载荷,根据原始的气动压力点的压力值,采用样条曲面拟合的方法,拟合得到翼面压力分布曲面,由该曲面得到有限元节点上的压力值,再在有限元模型单元上积分得到有限元节点载荷供强度设计使用.大型飞机具有复杂的增升装置,增升装置的气动载荷可能是三维的,对于三维的翼面载荷,直接在气动网格上积分得到气动载荷的小块集中力,然后按照沿某一方向投影的方法,找到该集中力作用的单元,最后按照二次规划的方法,将其分配到有限元节点上.

关 键 词:气动载荷  有限元节点  薄板样条

THE METHOD OF TRANSFERRING AERODYNAMIC LOAD TO FEM NODES FOR LARGE AIRPLANE
ZHANG Jiangang,SUN Renjun,TANG Changhong.THE METHOD OF TRANSFERRING AERODYNAMIC LOAD TO FEM NODES FOR LARGE AIRPLANE[J].Mechanics and Engineering,2017(1):25-29.
Authors:ZHANG Jiangang  SUN Renjun  TANG Changhong
Abstract:Transferring the aerodynamic load to FEM (finite element method) nodes is a hard work but is very important.In order to transfer the two-dimensional aerodynamic load,a thin plate spline surface of the pressure is constructed according to the existing pressure on the aerodynamic nodes.Then the pressure on the FEM nodes can be computed.At last the concentrated force on the FEM Nodes can be obtained by integration of the pressure on the FEM elements.The large airplane often has complicated high-lift devices and their aerodynamic load may be three-dimensional.For the three-dimensional aerodynamic load,with the integration of the pressure on the aerodynamic webs,the concentrated force on the aerodynamic nodes can be obtained,and these forces can be transferred to the FEM nodes using the quadratic program method.
Keywords:aerodynamic load  FEM (finite element method) nodes  thin plate spline
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