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本文以广州会展126.6 m张弦桁架为工程背景,利用ANSYS的Block Lanczos法,分析了张弦桁架的自振特性。针对不同的矢跨比、垂跨比、撑杆数量及布置等变化参数进行了大量分析,得出各参数对张弦桁架结构自振特性的影响规律。
In this paper, the 126.6 m chord truss of Guangzhou Convention and Exhibition is taken as the engineering background. By using the Block Lanczos method of ANSYS, the natural vibration characteristics of the truss string are analyzed. A large amount of analysis is made on different parameters such as span-to-span ratio, vertical-span ratio, number and arrangement of struts, and the influence of each parameter on the natural vibration characteristics of truss string structure is obtained.