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primary structure
    The control strategy is to remove relative vibrational energy associated with vibration from primary structure or minimize the total relative vibrational energy of the combined system.
    该方法通过优化设计主 -从结构间的被动耗能单元 ,最大限度地耗散结构的相对振动能量以减小主、从结构的整体振动水平 ,或最大限度地吸收主结构的相对振动能量以减小主结构的振动。
    For the complex compound system, interaction benefit to seismic resistance of primary structure in elastic stage .
    (1).对于复杂的复合体系,在弹性阶段,相互作用有利于主结构抗震。
    When the mass ratio of primary equipment is 30% of the mass of the floor and the period ratio is between 0.8~1.0, interaction is obviously effective to reduce seismic response for the primary structure. The reduction ratio of displacement and bottom shear force are up to 25% and 15% respectively.
    当主设备和所在楼层的质量比在30%,周期比在0.8~1.0之间时,相互作用对主结构有明显的减震作用,位移和底部剪力减小率分别达到25%和15%。
    The analytical formulas for determining optimum parameters of passive control devices used to link two parallel structures based on the principle of minimizing the averaged vibration energy of either the primary structure or the two parallel structures under a white noise ground excitation are firstly derived, and the influence of the structural parameters (damping ratio, mass ratio and natural frequency) of the system on the passive control effectiveness through three diffent numerical examples is also investigated.
    首先,根据平均能量(主结构或主-从结构)最小化原则,得到了在平稳白噪声激励下的被动控制单元的优化参数的一般表达式,并通过三个算例分析了不同结构参数(阻尼比、质量比、频率比)对控制效果的影响。
    Based on modes of the primary structure, the interaction between MTMD and primary structure is studied, and complex inertia mass is presented which explains clearly and briefly the action mechanism between MTMD and structure.
    基于主结构多模态耦合进行推导分析,阐述了MTMD与结构之间的相互作用关系,提出MTMD的复惯性质量。
    The two adjacent structures are simplified into two single-degree-of-freedom systems, and the connecting visco-elastic damper is represented by the Voigt model and the connecting fluid damper is represented by the Maxwell model, respectively. The optimal values for the two kinds of dampers are determined under the two objectives that minimize the averaged vibrational energy of the primary structure or the total averaged vibrational energy of the two adjacent structures under stationary white-noise ground motion, respectively.
    将两相邻结构简化为两单自由度体系,用Voigt模型模拟连接两相邻结构的粘弹性阻尼器,用Maxwell模型模拟连接两相邻结构的流体阻尼器,分别导出了在地面白噪声激励下主结构平均振动能量最小或两相邻结构总平均振动能量最小这两个控制目标下粘弹性阻尼器与流体阻尼器的优化参数的一般表达式。
    According to the steel tonnage of National Stadium large-span roof steel structure being relatively large in the original preliminary design,the load bearing capacity and connection characteristics of the structure were improved greatly by means of re-adjustment of the primary structure and secondary structure.
    针对国家体育场大跨度钢结构中存在用钢量较大的问题,通过对主结构和次结构的布置进行调整,使结构的受力性能与节点构造得到了改善;
 

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