采用非线性有限元分析技术预测复杂飞机结构静强度承载能力

Static Strength Check of Complicated Airframe Structure Based on Nonlinear Finite Element Method

文章采用非线性有限元分析技术对复杂飞机结构的静强度承载能力进行了计算。非线性有限元分析考虑几何、材料和接触非线性三种非线性类型。有限元分析结果与试验结果吻合。通过该工作表明,采用非线性有限元分析技术能够获得复杂结构的准确应力状态,结合适用的强度理论,可以精准预测复杂结构静强度承载能力。

A nonlinear finite element method（NFEM）,which covers geometry,material and contact nonlinear types,is used to obtain the static bearing capacity of complicated airframes. The NFEM results are in good agreement with test results, which indicates that the NFEM can accurately calculate the stress distribution and get the ultimate static strength of complicated structures.