本帖最后由 cip05yh 于 2009-3-29 23:59 编辑
*HEADING FLEXURAL BUCKLING (EULER COLUMN):B31OS,
*BEAM SECTION,SECT=I
*RESTART,WRITE,FREQUENCY=999
*NODE 1,0.0,0.0,0.0 21,12.0,0.0,0.0
*NGEN,NSET=ALL 1,21
*ELEMENT,TYPE=B31OS 1,1,2
*ELGEN,ELSET=BEAM 1,20,1,1
*BEAM SECTION,SECTION=I,ELSET=BEAM,MATERIAL=MAT 0.345,0.69, 0.3,0.3, 0.027,0.027, 0.0145 0.0,-1.0,0.0
*MATERIAL,NAME=MAT
*ELASTIC 2.1E11,0.3125!!!材料为铁
*ELSET,ELSET=PRINT 10,
*BOUNDARY 21,1,6 ALL,4,,0.
*STEP
*BUCKLE 10, ****BUCKLE,EIGENSOLVER=LANCZOS!!!换求方法 *****100,3000.0,40000.0
*CLOAD 1,1,100.!!!!轴向加载 (为什么在这里要加上荷载那?)
*NODE FILE, LAST MODE=4 U, RF
*EL FILE, ELSET=PRINT, LAST MODE=4 ENER, ELEN,
*END STEP
请教各位斑竹和大侠,为什么要在蓝色的地方加上荷载那?
是不是表示结构是被preloading的? 如果不是, 要做preloading 的结构的buckling 分析
不知道该如和做那? |