Drifting Impact Oscillator With a New Model of the Progression Phase
Drifting Impact Oscillator With a New Model of the Progression Phase
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DOI：
10.1115/1.4006379
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发表时间：
2012-11
期刊：
影响因子：
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通讯作者：
O. K. Ajibose;M. Wiercigroch;E. Pavlovskaia;A. Akisanya;Györygy Károlyi
中科院分区：
文献类型：
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作者：
O. K. Ajibose;M. Wiercigroch;E. Pavlovskaia;A. Akisanya;Györygy Károlyi
在本文中，提出了漂移振荡器的进展阶段的新模型。这是为了更准确地解释冲击器在静态和谐波激励的组合下穿透弹塑性固体的情况。首先，考虑半无限弹塑性介质受到具有圆锥形或球形接触表面的刚性冲击器重复冲击的动态响应，以制定接触加载和卸载阶段的相关力-穿透关系。然后使用这些关系来开发新漂移振荡器的物理和数学模型，其中通过介质的进展的时间历史包括加载和卸载阶段。对系统进行了非线性动态分析，并证实当系统表现出第一周期运动时，振荡器会发生最大渐进运动。两种接触几何形状（圆锥形或球形）的动态响应显示了一系列静态载荷的拓扑相似性。
In this paper, a new model of the progression phase of a drifting oscillator is proposed. This is to account more accurately for the penetration of an impactor through elasto-plastic solids under a combination of a static and a harmonic excitation. First, the dynamic response of the semi-infinite elasto-plastic medium subjected to repeated impacts by a rigid impactor with conical or spherical contacting surfaces is considered in order to formulate the relevant force-penetration relationship during the loading and unloading phases of the contact. These relationships are then used to develop a physical and mathematical model of a new drifting oscillator, where the time histories of the progression through the medium include both the loading and unloading phases. A nonlinear dynamic analysis of the system was performed and it confirms that the maximum progressive motion of the oscillator occurs when the system exhibits period one motion. The dynamic response for both contact geometries (conical or spherical) show a topological similarity for a range of the static loads.