CAJ | 학술논문

空腹夹层网壳是一种新型的曲面空间网格结构,它是由空腹网架结构演化而来.为了探究此类结构的动力特性,本文采用空间梁单元,通过参数化分析方法计算了大量算例,讨论了矢跨比、网壳厚度、网格划分频数以及弦层刚度对其动力特性的影响.为了使计算结果具有可比性,本文对所有计算算例施加相同的外部荷载.分析表明,矢跨比和厚跨比对空腹夹层网壳的动力特性有明显影响,但是网格划分频数及弦层刚度对结构的动力特性影响并不明显.
공복협층망각시일충신형적곡면공간망격결구,타시유공복망가결구연화이래.위료탐구차류결구적동력특성,본문채용공간량단원,통과삼수화분석방법계산료대량산례,토론료시과비、망각후도、망격화분빈수이급현층강도대기동력특성적영향.위료사계산결과구유가비성,본문대소유계산산례시가상동적외부하재.분석표명,시과비화후과비대공복협층망각적동력특성유명현영향,단시망격화분빈수급현층강도대결구적동력특성영향병불명현.
The open web sandwich shell is a new structure system which is developed from the open web lattice grids.In this paper,a large number of examples are analyzed by using parametric analysis method and space beam element.The dynamic properties of the structureeffected by rise-to-span ratio,grid frequency,thickness and stiffness of the layer is discussed.All examples are based on the same principle of the total load so as to make the results comparable.Analysis shows that the rise-to-span ratio and thickness-to-span ratio affect the dynamic behavior significantly.The frequency grid division and the stiffness of upper and lower chords have little effect on dynamic behavior.