The paper undertakes the finite element analyzing model for the floor part of the playing fields at Qingdao Sports Center,compares the floor vibration information from the three softwares,discusses the influence of the surrounding conditions of the floor on the structural vibration,and proves by the result that the selection for the modeling software has larger influence on the calculation results of the self-vibration feature,recommends the cooperation of the field measurement to identify the real dynamic features,and the surrounding condition of the plate will affect the vibration model.%对青岛体育中心体育馆比赛场地——楼盖部分建立了有限元分析建模,对比了三种软件求解出的楼盖振型信息,并讨论了楼盖边界条件对结构振型产生的影响。结果表明,建模软件的选择对自振特性计算结果影响较大,推荐配合现场实测来确定楼盖的真正动力特性;板四周边界条件将影响振动模态。
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