Design and Analysis of Slotted Block Horn Used For Ultrasonic Power Applications

This research aims to contribute a study of design and simulate the ultrasonic block horn configuration containing two slots in order to satisfy these criteria. The simulation and vibration mode shape characterization for the selected horn profiles are discussed and the analysis is accomplished using ABAQUS commercial software package, whilst the vibration modes are classified using experimental data from 3D Laser Doppler Vibrometer measurements. Modal and harmonic analysis are completed successfully to examine the natural frequency for the tuned horn. It is shown in the block horn design that an optimization of slot position will lead to high enough value of longitudinal mode with large uniformity displacement amplitude and low stress across the face of the horn; this is required in many applications and processes to ensure an adequate power transmit to the working parts sufficiently and effectively.

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Design of Multi-DOF Spherical Piezoelectric Motor Using Electrode Configuration Based Actuating Units

Volume 9: 15th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications ◽

10.1115/detc2019-97116 ◽

2019 ◽

Author(s):

Chi-Ying Lin ◽

Yu-Ting Sung ◽

Yu-Hsi Huang

Keyword(s):

Simple Structure ◽

Vibration Mode ◽

Piezoelectric Materials ◽

Longitudinal Mode ◽

Electrode Configuration ◽

Design Parameters ◽

Vibration Modes ◽

Compact Size ◽

Piezoelectric Motors ◽

Lateral Mode

Abstract Spherical piezoelectric motors (SPMs) apply piezoelectric materials as stators to generate modal responses for rotor orientation. The SPMs have the advantages of simple structure and compact size but may suffer from the difficulty of orientation manipulation. This paper presents a novel electrode configuration based SPM design for simple multi degree-of-freedom (DOF) orientation manipulation. Four piezoelectric actuating units are adopted as stators to generate 12 orientations through the integration and switch of two vibration modes of each piezoelectric actuator, including lateral mode and longitudinal mode. The dynamic characteristics associated with the design parameters at each vibration mode are experimentally obtained to evaluate the performance of the proposed SPM design.

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The Design of Piezoelectric Transducer for Structural Health Monitoring Using Longitudinal Vibration Modes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.413-414.407 ◽

2009 ◽

Vol 413-414 ◽

pp. 407-414 ◽

Cited By ~ 1

Author(s):

Xing Long Liu ◽

Zhong Wei Jiang

Keyword(s):

Vibration Mode ◽

Longitudinal Vibration ◽

Longitudinal Mode ◽

Vibration Modes ◽

Practical Applications ◽

Longitudinal Modes ◽

Impedance Response ◽

Piezoelectric Impedance ◽

Longitudinal Vibration Mode ◽

Fixed Beam

Longitudinal vibration mode is conveniently used for damage localization and detection in truss structure. However, a satisfactory piezoelectric impedance response due to longitudinal modes is not so easy to obtain in practical applications. The objective of this paper is to investigate how to obtain the impedance response of longitudinal modes with a piece of PZT transducer. In this case various vibration modes will be excited by unilaterally bonded PZT transducer, so the observation of longitudinal modes becomes complicated. In this paper, the effect of parameters of PZT transducer such as the length and attachment position is discussed in detail. Through selecting a suitable size and attachment position, the impedance response of expected longitudinal modes can be generated. An example for generating impedance peaks of specified longitudinal mode in fixed-fixed beam is given to demonstrate its validity.

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Composite right/left-handed transmission line with array of thermocouples for generating terahertz radiation

The European Physical Journal Applied Physics ◽

10.1051/epjap/2020200208 ◽

2020 ◽

Vol 92 (2) ◽

pp. 20502

Author(s):

Behrokh Beiranvand ◽

Alexander S. Sobolev ◽

Anton V. Kudryashov

Keyword(s):

Transmission Line ◽

Terahertz Radiation ◽

Transmission Lines ◽

Software Package ◽

Optical Pulses ◽

Capacitively Coupled ◽

Voltage Difference ◽

Left Handed ◽

Microwave Transmission ◽

Commercial Software Package

We present a new concept of the thermoelectric structure that generates microwave and terahertz signals when illuminated by femtosecond optical pulses. The structure consists of a series array of capacitively coupled thermocouples. The array acts as a hybrid type microwave transmission line with anomalous dispersion and phase velocity higher than the velocity of light. This allows for adding up the responces from all the thermocouples in phase. The array is easily integrable with microstrip transmission lines. Dispersion curves obtained from both the lumped network scheme and numerical simulations are presented. The connection of the thermocouples is a composite right/left-handed transmission line, which can receive terahertz radiation from the transmission line ports. The radiation of the photon to the surface of the thermocouple structure causes a voltage difference with the bandwidth of terahertz. We examined a lossy composite right/left-handed transmission line to extract the circuit elements. The calculated properties of the design are extracted by employing commercial software package CST STUDIO SUITE.

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Fast and Accurate Simulation of Novel Millimeter-Wave Circuits Based on Commercial Software Package

IEEE Microwave Magazine ◽

10.1109/mmm.2012.2234537 ◽

2013 ◽

Vol 14 (2) ◽

pp. 106-111 ◽

Cited By ~ 3

Author(s):

Jawad Attari ◽

Tarek Djerafi ◽

Ke Wu

Keyword(s):

Millimeter Wave ◽

Software Package ◽

Commercial Software ◽

Commercial Software Package ◽

Millimeter Wave Circuits

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Identifying VIV Vibration Modes by Use of the Empirical Orthogonal Functions Technique

21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 1 ◽

10.1115/omae2002-28425 ◽

2002 ◽

Cited By ~ 3

Author(s):

Gudmund Kleiven

Keyword(s):

Model Test ◽

Vibration Mode ◽

Multivariate Data ◽

Empirical Orthogonal Functions ◽

Mode Shapes ◽

Data Sets ◽

Vibration Modes ◽

Ocean Engineering ◽

Orthogonal Functions ◽

Related Technique

The Empirical Orthogonal Functions (EOF) technique has widely being used by oceanographers and meteorologists, while the Singular Value Decomposition (SVD being a related technique is frequently used in the statistics community. Another related technique called Principal Component Analysis (PCA) is observed being used for instance in pattern recognition. The predominant applications of these techniques are data compression of multivariate data sets which also facilitates subsequent statistical analysis of such data sets. Within Ocean Engineering the EOF technique is not yet widely in use, although there are several areas where multivariate data sets occur and where the EOF technique could represent a supplementary analysis technique. Examples are oceanographic data, in particular current data. Furthermore data sets of model- or full-scale data of loads and responses of slender bodies, such as pipelines and risers are relevant examples. One attractive property of the EOF technique is that it does not require any a priori information on the physical system by which the data is generated. In the present paper a description of the EOF technique is given. Thereafter an example on use of the EOF technique is presented. The example is analysis of response data from a model test of a pipeline in a long free span exposed to current. The model test program was carried out in order to identify the occurrence of multi-mode vibrations and vibration mode amplitudes. In the present example the EOF technique demonstrates the capability of identifying predominant vibration modes of inline as well as cross-flow vibrations. Vibration mode shapes together with mode amplitudes and frequencies are also estimated. Although the present example is not sufficient for concluding on the applicability of the EOF technique on a general basis, the results of the present example demonstrate some of the potential of the technique.

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Modelling of hydrodynamic cavitation for treatment of wastewater in a Venturi tube

Analecta Technica Szegedinensia ◽

10.14232/analecta.2020.1.61-66 ◽

2020 ◽

Vol 14 (1) ◽

pp. 61-66

Author(s):

Betti Bolló

Keyword(s):

Software Package ◽

Venturi Tube ◽

Hydrodynamic Cavitation ◽

Ansys Fluent ◽

High Effectiveness ◽

Commercial Software Package ◽

Promising Application ◽

Low Costs ◽

Modern Technologies ◽

Degradation Of Pollutants

Treatment of municipal effluents has long been a challenge for modern technologies combining high effectiveness of degradation of pollutants with low costs of the process. Hydrodynamic cavitation is a promising application in wastewater treatment due to its simple reactor design. In this work, for a system available in the laboratory a hydrodynamic reactor is designed based on literature recommendations. On the designed Venturi tube, two-dimensional numerical simulations were investigated by the means of CFD computations using the commercial software package, Ansys Fluent. The resulting cavitation bubbles were analysed at different inlet pressures.

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Investigation of Mass Sensitivity for the Piezoelectric Diaphragm Biosensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.411.245 ◽

2011 ◽

Vol 411 ◽

pp. 245-249

Author(s):

Shao Kang Li ◽

Wei Ren ◽

Xiao Feng Chen ◽

Xi Yao

Keyword(s):

Software Package ◽

Material Parameter ◽

Analytic Solution ◽

Vibration Mode ◽

Structural Parameters ◽

Flexural Vibration ◽

Mass Sensitivity ◽

Rayleigh Method ◽

Acoustic Wave Device ◽

Wave Device

The mass sensitivity of a piezoelectric diaphragm biosensor has been investigated. The piezoelectric diaphragm utilizing a flexural vibration mode is an acoustic wave device which can be immobilized with a bio-molecular recognition layer on its surface. The mass sensitivity of the sensor was analyzed by the approximately theoretical and FEM methods, respectively. The sensitivity formula expressed by the structural parameters and the material parameter was educed for easy computing. The procedure utilizing Rayleigh method for the analytic solution of the sensitivity was introduced. The expression was verified by using a commercial FEM software package, ANSYS. The simulations are well consistent with the theory.

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Influence of People Walking on Floor Performance due to Low Level Vibration

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.802.208 ◽

2015 ◽

Vol 802 ◽

pp. 208-213

Author(s):

Tuan Norhayati Tuan Chik ◽

Shurl Yabi ◽

Mohd Haziman Wan Ibrahim ◽

Nor Azizi Yusoff ◽

Taksiah A. Majid ◽

...

Keyword(s):

Software Package ◽

Laser Doppler Vibrometer ◽

Vibration Response ◽

Dynamic Loads ◽

Mode Shapes ◽

Low Level ◽

Vibration Data ◽

Finite Element Software ◽

Floor Structure ◽

Floor Vibrations

Abstract. Vibration in building is one of the important problems which need to consider, especially in designing the floor. Floor vibrations are generally caused by dynamic loads applied particularly by human activity especially walking. Although it is specified as low level amplitude, walking induced vibrations can cause discomfort to human occupants and alarming for a certain items of precision sensitive equipment. This paper investigates the vibration response on floor performance due to one, three and five of people walking. Laser Doppler Vibrometer was used to obtain vibration data when people are walking. Further analysis was carried out by using finite element software package ANSYS to simulate the floor under vibration inputs to obtain natural frequency and mode shapes of the floor structure. The vibration data was then analysed in ModalV analysis to generate the vibration response. Then, the results were checked against the vibration criteria level guideline as a crude tool comparison. As a result, the numbers of people walking were influenced the floor performance, which indicated five peoples walking show the highest response up to ISO level due to vibration compared with one people walking.

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