A generalized variational principle involving conditions of the rigid-plastic interface and the discontinuous surface of a velocity field has been put forward for the mixed-boundary value problem.
提出了一个包括界面条件及间断面条件在内的混合边值问题的广义变分原理，建立了极限载荷乘子的变分解析公式。
A 3d rigid-plastic FEM simulation coupled thermal model for TC4 titanium alloy by warm shear spinning is founded and the temperature boundary condition of heating by flame is applied.
针对TC 4钛合金锥形件建立了三维热力耦合有限元模型，在有限元模拟过程中叠加了火焰加热边界条件。
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