非常好的有限元课件（英文版）包括： 1.有限元基础 2.桁架结构 3.二维、三维结构 4.梁、框架结构 5.板壳结构 6.动力学分析-Finite Element Method and Application-PPT，include: 1.Foundations of FEM 2.Truss structures 3.2D and 3D solid structure 4.Beam and Frame Structures 5.Plate and S