scholarly journals A Dual Frequency Ultrasonic Cleaning Tank Developed by Transient Dynamic Analysis

2021 ◽  
Vol 11 (2) ◽  
pp. 699
Author(s):  
Worapol Tangsopa ◽  
Jatuporn Thongsri
Keyword(s):  
High Performance ◽  
Acoustic Pressure ◽  
Single Frequency ◽  
Response Analysis ◽  
Dual Frequency ◽  
Transient Dynamic Analysis ◽  
Ultrasonic Cleaning ◽  
Calculational Method ◽  
Successful Design ◽  
Harmonic Response Analysis

At present, development of manufacturer’s ultrasonic cleaning tank (UCT) to match the requirements from consumers usually relies on computer simulation based on harmonic response analysis (HRA). However, this technique can only be used with single-frequency UCT. For dual frequency, the manufacturer used information from empirical experiment alongside trial-and-error methods to develop prototypes, resulting in the UCT that may not be fully efficient. Thus, lack of such a proper calculational method to develop the dual frequency UCT was a problem that greatly impacted the manufacturers and consumers. To resolve this problem, we proposed a new model of simulation using transient dynamics analysis (TDA) which was successfully applied to develop the prototype of dual frequency UCT, 400 W, 18 L in capacity, eight horn transducers, 28 and 40 kHz frequencies for manufacturing. The TDA can indicate the acoustic pressure at all positions inside the UCT in transient states from the start to the states ready for proper cleaning. The calculation also reveals the correlation between the positions of acoustic pressure and the placement positions of transducers and frequencies. In comparison with the HRA at 28 kHz UCT, this TDA yielded the results more accurately than the HRA simulation, comparing to the experiments. Furthermore, the TDA can also be applied to the multifrequency UCTs as well. In this article, the step-by-step development of methodology was reported. Finally, this simulation can lead to the successful design of the high-performance dual frequencies UCT for the manufacturers.

scholarly journals A Novel Ultrasonic Cleaning Tank Developed by Harmonic Response Analysis and Computational Fluid Dynamics

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 335
Author(s):  
Worapol Tangsopa ◽  
Jatuporn Thongsri
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Acoustic Pressure ◽  
Circulation System ◽  
Response Analysis ◽  
Cleaning Process ◽  
Ultrasonic Cleaning ◽  
Harmonic Response ◽  
Water Circulation System ◽  
Harmonic Response Analysis

The manufacturer of an ultrasonic cleaning tank (UCT) received advise from a customer to seek the cause to why the UCT could not clean their products effectively and develop a novel UCT to replace the conventional model. This UCT had a capacity of 10 L, a frequency of 28 kHz, four horn transducers, and a total power of 200 W. To resolve that problem and respond to customers’ needs, we presented new methods to develop the UCT using the harmonic response analysis (HRA) and computational fluid dynamics (CFD) to simulate the cleaning process which occurred within the UCT based on the actual conditions. Results from the HRA showed that the acoustic pressure in a problematic UCT was low, resulting in a smaller cleaning area, which was consistent with the results from the foil corrosion test, and thus caused the cleaning process to be ineffective. We developed a novel UCT with improved effectiveness by adjusting the design and adding a water circulation system. From the HRA, we were able to design the dimensions of the UTC and position of the transducer to be suitable to increase the acoustic pressure and cleaning area. CFD results enabled us to design proper inlet and outlet shapes, as well as simulate the water flow behavior to find the optimal cleaning condition so the novel UCT had a water circulation system that could eliminate the excess particles.

Dynamic Response Analysis of NC Machine Tool's Bed on ANSYS

2013 ◽  
Vol 392 ◽  
pp. 122-126
Author(s):  
Hai Fei Qiu ◽  
Song Lin Wu
Keyword(s):  
Dynamic Response ◽  
Impact Load ◽  
Element Model ◽  
Response Analysis ◽  
Displacement Curve ◽  
Harmonic Load ◽  
Frequency Curve ◽  
Transient Dynamic Analysis ◽  
Nc Machine ◽  
Harmonic Response Analysis

Finite element model of NC machine tools bed was set up in ANSYS, natural frequencies and modal shapes in low order were calculated by modal analysis of the bed. Then displacement-frequency curve and stress-frequency curve between 300 Hz and 700 Hz were acquired based on harmonic response analysis of the bed, and dynamic response of the bed which affected by harmonic load was clear; Transient dynamic analysis of the bed was finished by Full method, then displacement curve and acceleration curve about time domain were acquired, and influence of impact load during the process of starting NC machine tool which affect on the bed was understand, in results, some important references and basis were offered to optimal design of the beds dynamics.

Structural Analysis of Agricultural Truck Frame Based on the Finite Element Method

2010 ◽  
Vol 37-38 ◽  
pp. 1236-1239
Author(s):  
Yun Wang ◽  
Bin Lin
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Structural Modification ◽  
Response Analysis ◽  
The Finite Element Method ◽  
Transient Dynamic Analysis ◽  
Frame Design ◽  
Harmonic Response ◽  
Harmonic Response Analysis ◽  
External Incentives

Frame is an important truck part to connect and support engine, transmission, carriage and cab etc. It is important to analyze strength, stiffness and dynamic characteristics for frame design. This paper developed static analysis of a specific agricultural truck frame under two conditions of full load bending and reverse. The corresponding suggestions of structural modification were proposed. Then the dynamic response of truck frame caused by the external incentives was studied, namely harmonic response analysis and transient dynamic analysis. The paper not only analyzed whether the truck frame met the strength requirements, but also proposed the corresponding solutions for the possible cases of fatigue fracture and stress overloaded of the frame.

Key Technology Research on Dynamic Design of a Large Vibrating Screen

2014 ◽  
Vol 709 ◽  
pp. 9-14
Author(s):  
Yong Lin Zhang ◽  
Xiao Peng Liu ◽  
Chuan Liang Hou
Keyword(s):  
Dynamic Stress ◽  
Dynamic Method ◽  
Design Method ◽  
Structure Design ◽  
Response Analysis ◽  
Transient Dynamic Analysis ◽  
Dynamic Design ◽  
Key Technology ◽  
Harmonic Response Analysis ◽  
Ansys Workbench

Abstract：The dynamic design method was used to analyze the vibrating screens, which can reveal the distribution of the dynamic stress in the main structure exactly and ensure safety and rationality of the structure design. The screens of the type 5XF150/180 grain screening machine were analyzed by the dynamic method. And modal analysis, harmonic response analysis and transient dynamic analysis were studied by ANSYS Workbench software. According to the calculated results ,dynamic property and kinetic parameters were determined. Then the key technology in the dynamic design was discussed, which provided a reference to the dynamic design of such large vibrating screens.

A Linear Piezoelectric Linear Motor Driven by the in-Plane Longitudinal and Bending Vibrations of an H-Shaped Vibrator

2012 ◽  
Vol 472-475 ◽  
pp. 2824-2827 ◽  
Author(s):  
Hong Lin He ◽  
Dong Mei Wu ◽  
Wen Guang Liu
Keyword(s):  
High Performance ◽  
Fem Simulation ◽  
Linear Motor ◽  
Response Analysis ◽  
Optimal Size ◽  
Bending Vibrations ◽  
Bending Vibration ◽  
Planar Vibration ◽  
Harmonic Response Analysis ◽  
Elliptical Motion

In order to develop theoretical instructions for design of high performance linear motor, a piezoelectric linear motor based on an H-shaped vibrator is proposed, which employed the vibrator’s 2nd bending vibration mode and 1st longitudinal planar vibration to drive the motor in this paper. Firstly, the driving principle of the motor is presented, and the elliptical motion generated on the driving end of the vertical bars of the vibrator is proved. Then, FEM simulation model is built for the vibrator, which is used to calculate the vibrator’s working modes and to execute harmonic response analysis and sensitivity analysis for the vibrator. Furthermore, the vibration’s optimal size is given and the motor assembly structure is designed. Finally, modal test is done for the vibrator to validate the anticipated work modes vibration and the bending vibration and longitudinal planar vibration could be 1.4μm and1.2μm under normal drive.

scholarly journals Performance Analysis of Single-Frequency MPPSK Integrated System for Ranging Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yu Yao ◽  
Lenan Wu
Keyword(s):  
High Performance ◽  
Integrated System ◽  
Single Frequency ◽  
Dual Frequency ◽  
Match Filter ◽  
Measurement Results ◽  
Parameter Values ◽  
Theoretical Considerations ◽  
Selection Of ◽  
Special Parameter

The dual-frequency MPPSK-MODEM is a flexible platform. When ranging accuracy request is low or platform is particularly limited by power, the platform would perform both data transmission and range measurement with single-frequency modes. In this paper, the ranging resolution of MPPSK pulse waveforms with the match filter and impacting filter processing are discussed, respectively. Also, the parameter selection of MPPSK modulator for ranging is considered. In particular, requirements that allow for employing such special parameter values for range measurements with high accuracy and high range are investigated. Moreover, high repetition frequency (HRF) biphase code MPPSK pulse train base onmsequence is presented, and the ranging accuracy of the proposed signal with the match filter processing is deduced. In addition to theoretical considerations, the paper presents system simulations and measurement results of single-frequency MPPSK integrated systems, demonstrating the high-performance of ranging applications.

scholarly journals Electrochemical Immunosensor for the Quantification of S100B at Clinically Relevant Levels Using a Cysteamine Modified Surface

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 1929
Author(s):  
Alexander Rodríguez ◽  
Francisco Burgos-Flórez ◽  
José D. Posada ◽  
Eliana Cervera ◽  
Valtencir Zucolotto ◽  
...  
Keyword(s):  
Frequency Analysis ◽  
Surface Characterization ◽  
Electrochemical Impedance ◽  
Limit Of Detection ◽  
Neuronal Damage ◽  
Charge Transfer Resistance ◽  
Single Frequency ◽  
Response Analysis ◽  
Transfer Resistance ◽  
Therapeutic Decisions

Neuronal damage secondary to traumatic brain injury (TBI) is a rapidly evolving condition, which requires therapeutic decisions based on the timely identification of clinical deterioration. Changes in S100B biomarker levels are associated with TBI severity and patient outcome. The S100B quantification is often difficult since standard immunoassays are time-consuming, costly, and require extensive expertise. A zero-length cross-linking approach on a cysteamine self-assembled monolayer (SAM) was performed to immobilize anti-S100B monoclonal antibodies onto both planar (AuEs) and interdigitated (AuIDEs) gold electrodes via carbonyl-bond. Surface characterization was performed by atomic force microscopy (AFM) and specular-reflectance FTIR for each functionalization step. Biosensor response was studied using the change in charge-transfer resistance (Rct) from electrochemical impedance spectroscopy (EIS) in potassium ferrocyanide, with [S100B] ranging 10–1000 pg/mL. A single-frequency analysis for capacitances was also performed in AuIDEs. Full factorial designs were applied to assess biosensor sensitivity, specificity, and limit-of-detection (LOD). Higher Rct values were found with increased S100B concentration in both platforms. LODs were 18 pg/mL(AuES) and 6 pg/mL(AuIDEs). AuIDEs provide a simpler manufacturing protocol, with reduced fabrication time and possibly costs, simpler electrochemical response analysis, and could be used for single-frequency analysis for monitoring capacitance changes related to S100B levels.

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