梁的种类 简支梁 Simple beam, 悬臂梁 Cantilever bean Simply supported beam 外伸梁 Beam with an overhang( overhangs)6 简支梁 Simple beam, Simply supported beam A B P1 P2 YA YB XA 梁的种类 悬臂梁 Cantilever beam A B P1 P2 MA YA XA P1 P2 外伸梁 Beam with an overhang (overhangs) A B C YA YB XA