CAJ | 학술논문

　　梁结构在工程设计中有着广泛应用，其支承情况多种多样，往往不能简单地按理想的固支或简支梁来处理。以一种混合边界条件下短梁结构为研究对象，进行了短梁的模态试验，并基于Abaqus有限元软件，分别对端面固定边界约束、一端固定边界约束、弹性＋固定边界混合约束条件下短梁结构进行模态分析。结果表明，边界约束条件通过改变系统刚度，导致模态特征改变。不同边界条件下的梁结构约束模态特征具有显著差异。采用混合边界条件的梁结构约束模态频率与试验结果吻合。
　　량결구재공정설계중유착엄범응용，기지승정황다충다양，왕왕불능간단지안이상적고지혹간지량래처리。이일충혼합변계조건하단량결구위연구대상，진행료단량적모태시험，병기우Abaqus유한원연건，분별대단면고정변계약속、일단고정변계약속、탄성＋고정변계혼합약속조건하단량결구진행모태분석。결과표명，변계약속조건통과개변계통강도，도치모태특정개변。불동변계조건하적량결구약속모태특정구유현저차이。채용혼합변계조건적량결구약속모태빈솔여시험결과문합。
Beam structure is widely employed in engineering applications .Its supporting conditions can not be easily dealt with as ideal fixed or simply supported ones in practice .The dynamics of a short beam under hybrid-boundary conditions was served as the study object .Modal analyses of short beam structure under different boundary conditions were performed by utilizing the finite element analysis software of Abaqus .Results show that the boundary condition can change the system stiffness ,and alter the structure modal characteristics .The modals of short beam vary from the boundary conditions .The analyzed modal frequencies of short beam under mixed bound-ary conditions consist well with the modal experiment results .