Theoretical analysis and finite element calculation of ultrasonic horn

Yang, Jilong; Ji, Shijun; Zhao, Jun; He, Qing

doi:10.1088/1757-899x/612/3/032032

Cited by 7 publications

(9 citation statements)

References 5 publications

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“…The front mass shape of the SUT is commonly named dualstepped shape. The shapes of the front mass [12][13][14][15][16] and the types of PZT [4,17,18] can directly affect the efficiency of the transducers. Therefore, to develop the efficiency of the cleaning process, this research proposed 5 models of the front mass shapes named dual-stepped (original), stepped, conical, exponential, hyperbolic, and modified dual-stepped as shown in Fig.…”

Section: E Proposed Models Of Sutmentioning

confidence: 99%

“…For the structural simulation, as general UTs combined with 3 components as front mass, piezoelectric (PZT), and back mass, the manufacturers commonly focus on using modal analysis to design and develop the front mass to reach its natural frequency and mode's shape consistent with the objective of the applications. Ordinary design of the front mass can be in the shape of hollow [12], stepped, cylindrical, conical, and exponential horns [12][13][14][15][16]. The manufacturers commonly use PZT4 and PZ8 as the main materials for the piezoelectric part to originate mechanical vibration.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the PZT8 has been used in devices that require higher durability than the PZT4 [17][18][19][20]. However, all mentioned technology in previous studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] cannot provide a satisfactory result in the industrial cleaning process. The produced cavitation still did not fully cover the industrial grade's tank even though there are several UTs installed.…”

Section: Introductionmentioning

confidence: 99%

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Vibration Analysis and Development of a Submersible Ultrasonic Transducer for an Application in the Inhibitory Activity of Pathogenic Bacteria

et al. 2021

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Development of a new generation of a submersible ultrasonic transducer (SUT) using vibrational analysis aimed for higher efficiency and inhibitory activity of pathogenic bacteria has been presented. The SUT with a dual-stepped shape of front mass and PZT8 transducer working at 50W, 110V, 50 kHz has been examined by the plate counting method. It was found that the SUT could inhibit pathogenic bacteria, e.g., Escherichia coli, Salmonella typhi, Staphylococcus epidermidis, and Staphylococcus aureus. For the vibrational analysis, the results were derived from structural and acoustic simulations using harmonic response analysis (HRA) in ANSYS software. In the structural simulation, the results showed a natural frequency and total deformations both inside and outside of the original SUT corresponding to the results measured by a laser doppler vibrometer. The acoustic simulation, set up as an actual operation at different depths from the water surface, has been applied. The HRA revealed various distributions of acoustic pressure. For further distances away from the SUT, the acoustic pressure decreased. When the SUT has been submerged deeper into the media, the acoustic pressure becomes larger at positions close to the bottom of the tank. This discovery is consistent with power concentration measurement. For the development of the SUT, this research proposed other 5 models as the candidate to be investigated. The results from the acoustic simulation confirmed that the different shapes of the front mass provided different acoustic pressure distributions. The wider head of the front mass in the modified dual-stepped shape generated the highest acoustic pressure and was fully distributed through an all-over cleaning tank. Therefore, this proposed model is suitable for industrial commercialization and possesses the inhibitory activity of pathogenic bacteria.INDEX TERMS Acoustic pressure, finite element method, harmonic response analysis, pathogenic bacteria, piezoelectric transducer, ultrasonic cleaning, vibration analysis.

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Section: E Proposed Models Of Sutmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vibration Analysis and Development of a Submersible Ultrasonic Transducer for an Application in the Inhibitory Activity of Pathogenic Bacteria

et al. 2021

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“…FEA to develop the transducer and tank body impacting the industries can be exemplified as follows. The structural analysis [1,2], modal analysis [3][4][5][6], and harmonic response analysis (HRA) [6] were employed to investigate stress, deformation, and related results for optimizing the design of front masses for transducers to suit usages. Furthermore, since the transducer consists of front mass, piezoelectric (PZT) material, and back mass, the PZT is also studied and developed for many purposes [7].…”

Section: Introductionmentioning

confidence: 99%

Harmonic Response Analysis of Tank Design Effect on Ultrasonic Cleaning Process

Phophayu

Kliangklom

Thongsri

2022

Fluids

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Several ultrasonic cleaning tanks (UCTs) had a problem: a manufacturer complained that there were damages to cleaning objects, they were unclarified, and it needed to be abruptly solved. To investigate and solve the problem, a small UCT filled with 3.92 L of water, with a frequency of 28 kHz, two horn transducers, and a total power of 100 W was built for simulation and experiment. A built tank body material of UCT can be adjustable to acrylic, glass, and stainless steel. Since the cavitation causing the cleaning relates to acoustic pressure, harmonic response analysis (HRA) in ANSYS software was employed to calculate the acoustic pressure inside the UCT for different designs such as mentioned materials, power, thickness, volume, and frequency. The HRA results revealed uneven acoustic pressure depending on the tank designs, consistent with foil corrosion and power concentration experiments. Furthermore, using the tank body material with acrylic, glass, and stainless steel provided the highest, moderate, and lowest acoustic pressure levels, respectively. The uneven acoustic pressure resulted from the differences in material transmission coefficients. In addition, the damage occurred because of improper tank design, resulting in excessive acoustic pressure. Therefore, the tank design is indispensable in designing high-efficiency UCTs to reduce damage and meet customer requirements.

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“…However it may cause reduction in amplitude of vibration as well [7]. The stresses in cylindrical, conical, Gaussian, exponential and catenoidal horn designs are very low, but the amplitude of vibration at the tool end is also extremely less as compared to the step design [6,10,13,20,31,32]. Slots and holes have been incorporated in some horn designs to increase the amplitude of vibration and reduce stresses [7,26,[33][34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Numerical Evaluation of State of the Art Horn Designs for Rotary Ultrasonic Vibration Assisted Machining of Nomex Honeycomb Composite

Mughal

Qureshi

Qaiser

et al. 2021

Preprint

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Ultrasonic horn plays vital role in achieving vibration amplitude suitable for efficient machining of advanced composites. Due to very high operating frequency of at least of ultrasonic machining system, horn may be subjected to high stresses leading to failure. Mechanical horn is designed to get optimum vibration amplification while keeping stresses in acceptable limits. In this research, state of the art ultrasonic horns were designed with same length and diameters at the transducer side and tool ends under similar operating conditions. All standard and hybrid ultrasonic horns, including some new designs, suitable for machining applications were evaluated through finite element analysis. Modal analysis was performed for computing axial modal frequencies, whereas harmonic analysis was carried out to determine vibration amplitude, stresses and factor of safety. The performance of state of the art ultrasonic horn designs were later compared in terms of vibration amplification, stresses and operating life. The axial modal frequency and amplitude of vibration achieved by barrel, cylindrical-double conical and hollow exponential horns were observed to be greater as compared to the step horn, however the former were prone to greater stress concentrations and low operating life. Reasonably higher vibration amplification, factor of safety and low stresses were achieved by Bezier, cylindrical-catenoidal, cylindrical-Bezier, step-conical, step-catenoidal, step-Bezier, double conical, multistep and multistep-conical horn designs. Remarkably, circular hollow exponential and multistep-conical ultrasonic horns were observed to achieve vibration amplification, factor of safety and operating life higher than that of commercially available step horn.

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Theoretical analysis and finite element calculation of ultrasonic horn

Cited by 7 publications

References 5 publications

Vibration Analysis and Development of a Submersible Ultrasonic Transducer for an Application in the Inhibitory Activity of Pathogenic Bacteria

Vibration Analysis and Development of a Submersible Ultrasonic Transducer for an Application in the Inhibitory Activity of Pathogenic Bacteria

Harmonic Response Analysis of Tank Design Effect on Ultrasonic Cleaning Process

Numerical Evaluation of State of the Art Horn Designs for Rotary Ultrasonic Vibration Assisted Machining of Nomex Honeycomb Composite

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