民用飞机机身节点载荷计算方法研究

Research on calculation method of civil aircraft fuselage grid force

提出了机身节点载荷的计算方法。首先将分布载荷处理成框站位载荷,其次根据框面内载荷计算得到机身垂向及侧向节点载荷,根据框面外载荷计算得到机身轴向节点载荷,最终得到整个机身的节点载荷,完成了机身载荷从分布载荷到节点载荷的转换。实例计算结果表明:运用该机身节点载荷计算方法所得结果误差小,节点载荷分布合理、有效。

According to the requirements of finite element internal force calculation of fuselage,a set of processing methods for fuselage grid force are put forward,which solve the key technology of fuselage load changing from distributed load to grid force.According to this method,the distributed load is firstly processed into the frame station load.Secondly,the vertical and lateral grid force of the fuselage are calculated according to the load inside the frame plane.The axial grid force of the fuselage is calculated according to the load outside the frame plane.Finally,the grid force of the whole fuselage is obtained,and the transformation from distributed load to grid force is completed.The results show that the calculation method of fuselage grid force has less error,and the distribution of grid force is reasonable and effective.