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首页> 外文会议>International Conference on Mechanical Engineering and Mechanics vol.2; 20051026-28; Nanjing(CN) >Using Inner Mass Impact Damper for Attenuating Structural Vibration and Experimental Research
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Using Inner Mass Impact Damper for Attenuating Structural Vibration and Experimental Research

机译：使用内部质量冲击阻尼器减轻结构振动和实验研究

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摘要

The characteristics of a vibration system suppressed with an impact damper are investigated, where impact damper is simplified using spring and viscous damping. The analysis begins with the derivation of simple, yet accurate approximations for free vibration response of the structure-absorber system. An analytical theory is developed for the optimal values of the impact damper damping and initial displacement in a single-of-freedom structure. The relation between coefficient of restitution and damping ratio is obtained. The research shows that the effective reduction of the vibration of the vibration response doesn't depend on the number of impacts but primarily on the type of collision that the impact mass collides with the main mass face-to-face. Results also show that the clearance of an effective impact damper should be smaller than twice of the initial displacement of the main mass of the vibration system if the system is stimulated by an initial displacement only. The theory is generalized to continuous structures. An example of an impact damper in a rotating cantilever beam demonstrates that the impact dampers are suitable for attenuating the impulse response of structures unconditional stabilization without the requirement of the accuracy of the modal information.
机译：研究了用减振器抑制的振动系统的特性，其中使用弹簧和粘性阻尼简化了减振器。分析从推导结构吸收系统自由振动响应的简单而精确的近似开始。针对单自由度结构中的阻尼器阻尼和初始位移的最佳值，开发了一种解析理论。得到恢复系数与阻尼比之间的关系。研究表明，有效减小振动响应的振动并不取决于冲击的数量，而主要取决于冲击质量与主质量面对面碰撞的碰撞类型。结果还表明，如果仅通过初始位移来激励振动阻尼器，则其有效间隙应小于振动系统主质量初始位移的两倍。该理论被推广到连续结构。旋转悬臂梁中的冲击阻尼器的一个例子表明，该冲击阻尼器适合于无条件稳定地减弱结构的脉冲响应，而无需模态信息的准确性。

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