The contact between welding plate and fixture is treated as constraint in the finite element model of dynamic welding angular distortion simulation for overlayer in CO2 gas arc welding.

摘要采用有限元数值模拟方法研究了CO2气体保护堆焊的角过程。为了反映和焊接件的接触状，和焊件统一建立有限元模型。

A theory of aeroelastic stability of hingeless rotor blade in hover by using the Galerkin weighted residual finite element method is developed in this paper.

采用伽辽金加权余数有限元素法发展了一种悬停状下无铰旋翼桨叶气弹稳定性的分析方法。