Theoretical analysis and experimental measurement for resonant vibration of piezoceramic circular plates

2004 ◽  
Vol 51 (1) ◽  
pp. 12-24 ◽  
Author(s):  
Chi-Hung Huang ◽  
Yu-Chih Lin ◽  
Chien Ching Ma
Keyword(s):  
Theoretical Analysis ◽  
Experimental Measurement ◽  
Resonant Vibration ◽  
Circular Plates

Vibration Analysis for Piezoceramic Circular Plates with V-Notches. Part 1: Theory

2014 ◽  
Vol 30 (6) ◽  
pp. 603-609 ◽  
Author(s):  
C.-H. Huang ◽  
Y.-Y. Chen
Keyword(s):  
Theoretical Analysis ◽  
Transverse Vibration ◽  
Stress Singularity ◽  
Trigonometric Polynomials ◽  
Circular Plates ◽  
The Finite Element Method ◽  
Electrical Field ◽  
Ritz’S Method ◽  
Frequency Variations ◽  
Good Agreement

AbstractIn this paper the transverse vibration characteristics of piezoceramic circular plates with V-notches are investigated theoretically through use of the Ritz's method incorporated with the defined equivalent constants. The Ritz's method is employed with two sets of admissible displacement functions, algebraic-trigonometric polynomials and corner functions, to guarantee convergence sufficiently and represent the stress singularity, respectively. Moreover, the equivalent constants derived by comparing the characteristic equations of transverse vibration between isotropic and piezoceramic disks are applied to suspend the electrical field consideration regarding the piezoelectricity. With the aid of theoretical analysis, the non-dimensional frequency parameters of transverse vibration modes for completely free V-notching circular plates are exhibited; in addition, the frequency variations depending on various notch angles and depths are explored. Numerical calculations using the finite element method (FEM) are performed and the results are compared with the theoretical analysis. It is shown that the resonant frequencies predicted by theoretical analysis and calculated by FEM are in good agreement.

Efficient Transport Bindings for Web Service Messages

2011 ◽  
pp. 83-109
Author(s):  
Christian Werner ◽  
Carsten Buschmann ◽  
Tobias Jäcker ◽  
Stefan Fischer
Keyword(s):  
Theoretical Analysis ◽  
Web Service ◽  
Mobile Communication ◽  
Experimental Measurement ◽  
User Interaction ◽  
Low Latency ◽  
Ip Multicast ◽  
Measurement Results ◽  
Efficient Communication ◽  
Latency Analysis

Although Web service technology is being used in more and more distributed systems, its areas of application are inherently limited by high latencies and high amounts of protocol overhead. For messaging in environments with user interaction, like Web platforms for business or multimedia applications, the response time of the whole system needs to be kept in tight boundaries. In other scenarios comprising mobile communication and battery-powered devices, bandwidth-efficient communication is imperative. In this chapter we address both of these issues. First we conduct a detailed latency analysis of different transport mechanisms for SOAP and then we thoroughly investigate their protocol overhead. For both aspects we present a theoretical analysis as well as experimental measurement results. We then will introduce a new transport binding called PURE that significantly reduces the protocol overhead while featuring low latency. Furthermore it enables interesting additional features such as point-to-multipoint communication via IP multicast and broadcast.

Wet oxidation kinetics of AlAs at elevated temperatures

2003 ◽  
Vol 18 (5) ◽  
pp. 1027-1030 ◽  
Author(s):  
Sun-Chien Ko ◽  
Sanboh Lee ◽  
Hai-Lin Wang ◽  
Y. T. Chou
Keyword(s):  
Boundary Layer ◽  
Theoretical Analysis ◽  
Experimental Measurement ◽  
Oxidation Kinetics ◽  
Elevated Temperatures ◽  
Thickness Effect ◽  
Wet Oxidation ◽  
Alas Layer ◽  
Boundary Layer Diffusion ◽  
Kinetics Of

Wet oxidation in the AlAs layer sandwiched between two GaAs plates was investigated for the temperature range of 400 to 480 °C. The oxidation rate increased with increasing thickness of the AlAs layer. Theoretical analysis based on the boundary layer diffusion was performed to account for the thickness effect. The theory is in excellent agreement with the experimental measurement.

Response and Failure of Ductile Circular Plates Struck by a Mass

1997 ◽  
Vol 119 (3) ◽  
pp. 332-342 ◽  
Author(s):  
N. Jones ◽  
S.-B. Kim ◽  
Q. M. Li
Keyword(s):  
Theoretical Analysis ◽  
Mild Steel ◽  
Aluminium Alloy ◽  
Reasonable Agreement ◽  
Failure Mechanisms ◽  
Experimental Studies ◽  
Experimental Results ◽  
Steel Plates ◽  
Circular Plates ◽  
Plastic Response

A theoretical analysis is presented in this paper to predict the dynamic plastic response of aluminium alloy and mild steel circular plates when struck normally by blunt solid cylindrical masses at the center. Reasonable agreement is obtained with experimental results for the permanent transverse displacements. Different failure mechanisms, which have been found in previous experimental studies on aluminium alloy and mild steel plates, are also illustrated by the proposed theory.

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