...自振特性；预应力混凝土连续梁桥[gap=1221]Key words: random vibration; time varying system; free-vibration characteristic; prestressed concrete continuous bridge..
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At first,free vibration characteristic of the structure is analyzed,and it is discovered that the frequencies are denseness,moreover vertical vibration is dominant,the combination of ribbed truss and pre-stressed cables enhanced the structure's stiffness in some degree.
文中首先分析了该结构的自振特性，发现该结构频谱密集，结构以竖向振动为主。
参考来源 - 加肋预应力穹顶结构的动力及稳定性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A new method of estimating characteristic parameters for continuous spectrum of response signal of damped free vibration is presented in this paper.
针对自由衰减振动信号的连续谱，提出了一种估计特征参数的方法。
When the stator frame and stator core are taking as a whole vibration system, its characteristic of free vibration can be calculated.
将机座和铁芯作为整体振荡系统，计算其自振特性。
The free vibration characteristic of bridge structure is the important parameter for the dynamic and seismic analysis of structure.
桥梁结构的自振特性是结构动力分析和抗震分析的重要参数。
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