装配式桥梁模态综合法的误差研究  

Error Research on Mode Synthesis Method of Prefabricated Bridge

作　　者：张军[1] 江克斌[1] 胡业平[1] 朱光远[1] 

机构地区：[1]解放军理工大学工程兵工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2002年第3期64-66,共3页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：模态综合法应用于装配式桥梁结构振动分析的主要问题 ,是在将子结构坐标缩聚为模态广义坐标的过程中 ,如何选取适当数目的低阶模态来参与综合。在动力学原理的基础上对装配式桥梁约束模态综合法的误差进行了分析 ,发现综合模态数量对频率的误差比较敏感 ,而对模态的误差不太敏感。The main problem of the mode synthesis method, applied in structural vibration analysis of prefabricated bridges, is how to select relevant number of low frequency modes synthesized during the course that displacements of substructures are expressed in generalized coordinates that are defined by displacement modes. The errors of mode synthesis method in vibration analysis of prefabricated bridges are researched on the basis of kinetic principle in the paper, which shows that the number of modes synthesized is more sensitive to errors of frequency than to the errors of mode. The formula of error theoretic analysis can be used as guideline to select the number of modes synthesized.

关 键 词：误差分析 模成综合法 子结构 装配式桥梁 

分 类 号：U441.7[建筑科学—桥梁与隧道工程]