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	1. Influences of electrode arrangements on flexural vibrations of piezoelectric ceramic tubes
	Zhang Hui,Zhang Shuyi,Fan Li
	Physics 05 March 2012
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:Flexural vibration characteristics of piezoelectric ceramic tubes in acoustic actuators are studied by an electro-mechanical coupling Timoshenko beam model. In the model, the piezoelectric effects are considered, and effects of the different electrode arrangements on Young's modulus are investigated. Additionally, the particular attentions are devoted to effects of the mass loads on flexural resonance frequencies of the piezoelectric ceramic tubes. The predicted resonance frequencies of the ceramic tubes are sensitive to the mechanical parameters of the tubes. The bipolar and unipolar electrode arrangements have little effects on the flexural vibrations of piezoelectric ceramic tubes in acoustic actuatorsn.
	TO cite this article:Zhang Hui,Zhang Shuyi,Fan Li. Influences of electrode arrangements on flexural vibrations of piezoelectric ceramic tubes[OL].[ 5 March 2012] http://en.paper.edu.cn/en_releasepaper/content/4468267


	2. Formation and transport of granular heaps in vertically vibrated containers with periodic corrugated bottoms
	Hua Zhang,Qi Wang,Guoqing Miao
	Physics 14 January 2008
	Show/Hide Abstract \| Cite this paper︱Full-text: PDF (0 B)

	Abstract:We report the formation and transportation of granular heaps in vertically vibrated containers with two types of periodic corrugated bottoms, one with a periodic array of ten identical Plexiglas rectangles mounted (named periodic container), and other with single-step (named single-step container). For the periodic container, when the excitation was weaker, several small heaps formed, and the number of them was the same as that of the rectangles on the bottom. As the excitation increased, the system presented three types of states：single well-defined heap, weaker wave, and stronger wave. Some local convections were observed in the interior of heap. For the single-step container, we observed the transportation of a heap toward step. We propose that the compressive force from the ambient gas plays a crucial role for the movement of the heap.
	TO cite this article:Hua Zhang,Qi Wang,Guoqing Miao. Formation and transport of granular heaps in vertically vibrated containers with periodic corrugated bottoms[OL].[14 January 2008] http://en.paper.edu.cn/en_releasepaper/content/18032

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