혼합근사에 의한 요소 내 힘 평형을 만족하는 3차원 곡선 보 요소의 개발

Abstract

A 3-D mixed curved beam element satisfying equilibrium equations has been developed based on the Hellinger-Reissner principle. For the description of deformation and equilibrium. nodal displacements and resultant forces are taken as independent field variables. Nodal displacements are linearly approximated and resultant forces are approximated as constants. Accuracy of the element has been greatly enhanced by satisfying the pointwise equilibrium of resultant forces along the element