摘要
C_0连续的弯曲单元得到了广泛应用,一方面由于计算较厚结构(如夹层结构)的需要,一方面由于在构造C_1连续单元时遇到困难。但C_0连续单元有“剪切锁团”问题,即当计算薄的结构时,剪切应变能愈来愈大,结构过分刚硬,位移很小。“减缩积分”
The paper tries to analyse the causation of shear locking for co-continuity bending elements, pointing out that the gross error of equilibrium in the elements is essential. Bulb functions and high order terms have been added to the shape functions to improve the equilibrium relationship but the total number of element D. O. F. was not increased. Numerical examples show that the shear locking is relieved. Hourglass'can be avoided because reduced integration is no longer needed. Also, accuracy deterioration when computing thick plates is removed.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1989年第1期A074-A078,共5页
Acta Aeronautica et Astronautica Sinica
关键词
剪切锁闭
shear locking, essence, elimination.
