1. 西安交通大学航天航空学院,西安,710049
2. 西安交通大学强度与振动教育部重点实验室,西安,710049
网络首发:2010-11-10,
纸质出版:2010
移动端阅览
王建伟 1, 徐晖 1, 2, 等. 内嵌自主移动钢球欧拉梁自适应碰撞减振研究[J]. 西安交通大学学报, 2010,44(11):103-108.
Vibration Suppression via Adaptive Impacts for Euler Beam with Interior Inlaid Freely Moving Steel Ball[J]. 2010, 44(11): 103-108.
结合内嵌自主移动质量子系统梁/板实验平台的实验结果
对共振激励下的内嵌自主移动钢球欧拉梁自适应碰撞减振系统进行了研究.采用弹簧、阻尼表现碰撞过程中的弹性恢复与能量耗散
将碰撞机制转化为线性弹簧-阻尼模型
并基于赫兹接触理论对相关参数进行了估算.通过分析建立了碰撞的开始与结束条件
以及系统的分段线性动力学控制方程
数值计算结果充分表明了内嵌自主移动钢球自适应碰撞减振的内在机理与有效性.在钢球随机碰撞作用下
梁的振动响应为概周期振动
一阶共振激励下单个钢球的碰撞减振效果为7.5%
二阶共振激励下为6.1%.通过与假定钢球在其他位置实施碰撞减振的效果进行比较
证明了内嵌钢球的自适应碰撞减振特性.
Combining the experiments carried out in the experimental workbench for beam and plate with interior inlaid freely moving mass
a self-adaptive impact vibration suppression system
i.e. a Euler beam with an interior inlaid freely moving steel ball under the principal resonant harmonic excitation
is investigated. In the theoretical analysis
a linear spring-damping model is employed to simulate the impact mechanism between steel ball and beam interior walls
where the elastic recovery and energy dissipation in impacts are respectively characterized by the spring and damping in the model
and relative parameters are also determined according to the Hertz contact theory. Then for the impact system
the linear piecewise dynamic equations and the beginning and ending conditions for impacts are all established. Numerical results demonstrate the inherent mechanism and effectiveness of adaptive impact damping for the steel ball in suppressing the beam vibration
and the vibration is reduced by 7.5% and 6.1% respectively under the first and second principal resonant harmonic excitations. Moreover
the beam vibration does not get periodic but quasi-periodic. Assuming that the impacts take place on a virtual location instead of the actual location observed in experiments
the self-adaptive impact damping characteristic is proved for the steel ball.
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利用遗传算法的磁流变阻尼器结构含时滞半主动控制. 西安交通大学学报,2010,44(9):122-127.
可控磁悬浮系统的转子周期性振动抑制. 西安交通大学学报,2010,44(7):55-58.
考虑损伤程度的设备运行可靠性研究. 西安交通大学学报,2010,44(1):36-40.
含双时滞振动主动控制系统的稳定性分析. 西安交通大学学报,2010,44(1):112-116.
时频域交互法在微滑移干摩擦阻尼叶片振动分析中的应用. 西安交通大学学报,2009,43(11):22-26.
离心风机蜗壳振动声辐射的定量预测. 西安交通大学学报,2009,43(9):71-74.
圆柱壳高频弯曲振动的能量有限元分析. 西安交通大学学报,2008,42(9): 1113-1116.
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