SHAPE OPTIMIZATION OF SPACE STRUCTURES FOR BUCKLING LOAD
座屈荷重を目的関数とする空間構造の形状最適化に関する研究

Kenji YAMAMOTO, Youichi MINAKAWA, Hiroshi OHMORI
2003 Journal of Structural and Construction Engineering (Transactions of AIJ)  
This paper addresses the shape eptimizat 正 on preblern of the rnaximization ofcriticat load of space structures witlt given volume . The problem is dealt } uith . as the nonlinear programming problem . It is difficutt to dir サ ctly 【 駐 aximize the non − 1inear buckling load factor as the o ヒ ) jective fuhcIion because ofthe large calculated amount and lhe possible coincidence of several criticai points on Qptima 】so ] ution , On the other hand, evaluated as iinear eigenvalue problem , the
more » ... problem , the buckling I6ad may not be appropriate since the . prebuck 且 jng deformation is disregarded . In 【 his paper , to take account ofthe effect . ofprebuekling def()rmatien , the bucklifig load is estimated by perfDrming linear eigenva ] ue analysis on an equilibrium point with specified deformation . The proposed scheme and its sensitivity analysis method are described , An arch ・ and a two −way grid shetl are shewn as numeri . cal exarnples , 血 e e 娵 tivity of the present method is confirmed through these examples , and the structural characteristics ofthe result are also discussed 、 Keywords : bucktゴ ng ' oad , shape optimization , space structure , sensitiv ゴ tY anaiysis , non ' 惚 σ 厂 P 厂ogramming P 厂0 う' em
doi:10.3130/aijs.68.95_1 fatcat:64aqbdvsmvgqbm6j2ej7rghk5q