§91轴向拉压杆的变形及刚度计算 (3)求结点A的位移 AA =AE+ea AA 2 sing tan 8 0.48mm0.24mm 1376mm 0.5 0.577 AA,=△L1=0.24mm AA=\(AA3)2+(AA2 =√(1376mm2+0.24mm)2=1.40mmc9-1 ᅀ຿ࣸགئԅέ໹ذރէޙസ
˄3˅∖㒧⚍Aⱘԡ⿏ 1.376 mm 0.577 0.24 mm 0.5 0.48 mm sin tan 1 2 3 3 = + = = + = + θ ∆ θ ∆ l l AA AE EA AA2 = ∆ l2 = 0.24 mm (1.376 mm) (0.24 mm) 1.40 mm ( ) ( ) 2 2 2 2 2 3 ' = + = AA = AA + AA