( 2 ) through the modal analysis , compares and sums up the change of the free vibration characters of the model under different belted outrigger plans ( 2 )对结构有限元模型进行模态分析，比较和总结了不同加强层设置方案下，结构自振特性的变化。
This paper discusses the effect of suspended mass , rigidity on structure frequencies and compares the result from simplification model with that from precision model 并举一算例讨论了刚度、质量对其自振频率的影响，对两种模型计算的结果作了比较。
( 6 ) through the modal analysis of the reinforced earth retaining wallmade of different material , the effection of different material to natural frequency is gained ( 6 )对不同材料的加筋土挡墙进行模态分析,得到了不同材料对加筋土挡墙自振频率的影响规律。
This paper introduces the designed engineering project as a special case to find the critical path method and discusses the main features in the anti - seismic design model 对测试数据中判别出的结构低阶自振频率与有限元计算结果进行对比，分析误差的合理原因。
In calculation of dynamical character of supporting structure in the powerhouse of hydropower station , the simulation range is larger and the value of the natural vibration frequency is less 摘要对于水电站机组支承结构而言，模拟?围愈大，计算出的自振频率愈低。
This paper analyses the impacts of different restrains , different loads and different pre - stress value of cable on the natural vibration frequency , damping ratio and mode of structure 分析不同配重情况、预应力值大小、支座约束对此类结构自振频率、阻尼比、振型的影响规律。
( 3 ) furthermore , the stiffness effect induced by the infill walls makes the natural period of the frames decrease , which makes the earthquake forces put on the structures increase 3 .另外,填充墙刚度效应的存在使得结构自振周期减小,从而使作用于整个建筑上的水平地震作用增大。
The 1st to 12th vibration modes and periods which influence greatly on the truss are listed to investigate the distributions of the truss mass and stiffness 在对该结构体系进行模态分析后，提取对结构有影响的前12阶模态，列出每一阶模态的自振周期及主振型，用于考察结构的质量分布和结构刚度。
The dynamics analysis of the structural model both with and without viscous dampers are carried out by using the complex modal method , and the corresponding programs are compiled 在减震和非减震情况下，利用复模态分析法计算了结构模型的自振特性及地震响应，并编制了相应的地震反应分析程序。
