Approximate Evaluation of Acoustical Focal Beams by Phased Array Probes for Austenitic Weld Inspections

Kono, Naoyuki; Miki, Masahiro; Nakamura, Motoyuki; Ehara, Kazuya

doi:10.1063/1.2718055

Cited by 2 publications

(4 citation statements)

References 1 publication

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“…In a similar way it is possible to discuss point focusing beam generated by a matrix array or linear array with curved elements [5]. In a similar way it is possible to discuss point focusing beam generated by a matrix array or linear array with curved elements [5].…”

Section: Parameters Of Phased Array Probesmentioning

confidence: 99%

“…Acoustical fields of 45-degree angled focal beams with various pitches are calculated using the Fresnel-Kirchhoff diffraction integral (FKDI) method [5] in Figs. Appropriate choice contributes to suppression of side lobes which propagate to undesired directions.…”

Section: Pitch: Suppression Of Grating Lobesmentioning

confidence: 99%

“…We utilized the approximation formula for focal length [5] to predict calculation conditions which give desired actual focal length covering inspection regions. volume region of welds or boundary of welds.…”

Section: Approximation Formulamentioning

confidence: 99%

“…Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. [5], which is useful for selection of calculation conditions for MGB modeling. Huang et al [3] proposed a modification of multi-Gaussian beam (MGB) modeling to array probes.…”

Section: Introductionmentioning

confidence: 99%

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Development of Phased Array Probes for Austenitic Weld Inspections Using Multi-Gaussian Beam Modeling

Kono¹,

Baba²

2008

AIP Conference Proceedings

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Phased array ultrasonic testing techniques have been applied to sizing of cracks in welds, especially stainless steels and nickel based alloys welds. Ultrasonic phased array probes are capable of providing high SN ratio and high resolution by means of focal beams with various depths, positions, and angles. In this study, a simple design method using numerical analysis is proposed to optimize parameters on array probes. Acoustical fields of array probes are calculated approximately based on a multi-Gaussian beam modeling for single transducers. Calculation results are compared with experimental data with a laser interferometer. Validity of the modeling for the acoustical fields of the array probes is confirmed by good agreement between simulations and experiments. In order to design array probes that satisfy inspection requirements, e.g. range and resolution, an index of focusing (focusing factor) is important in addition to the parameters of array probes. Specifications of array probes are discussed for two kinds of requirements, wide range and high resolution.

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Section: Parameters Of Phased Array Probesmentioning

confidence: 99%

Section: Pitch: Suppression Of Grating Lobesmentioning

confidence: 99%

Section: Approximation Formulamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Development of Phased Array Probes for Austenitic Weld Inspections Using Multi-Gaussian Beam Modeling

Kono¹,

Baba²

2008

AIP Conference Proceedings

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3-D Modelings of Radiated Ultrasonic Wave Field from Linear and Matrix Phased Array Transducers and Comparison of Their Performances

Nakahata

Ishikawa

Kono³

2009

Trans.JSME, Ser.A

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〕 n has hcen proposed in order tD calculate off − axis wave 恥 lds from an ultrasonic transducer as well as on − ax 互 s wave fields ． Using this MGB model ， we can model three dimens玉 onal ( 3 − D )elastic wave fields radiated fr 〔 ) m an array transducer to a g ． olid with an efHcient computational time．亙 n this paper ， brief formulations of th巳 MGB model are described 丘rst and then the accuracy of the MGB model i5 Ghecked ill comparisoll with results of the Rayleigh − Sommerfeld numerical integral mode1 ， As applications of the MGB mode1 ， we investigate performances of both linear and 皿 a むrix phased array transducers using the MGB inodel ． Also the 3 − D wave fields froln the matrix phased array transducer irl solid are visualized

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Approximate Evaluation of Acoustical Focal Beams by Phased Array Probes for Austenitic Weld Inspections

Cited by 2 publications

References 1 publication

Development of Phased Array Probes for Austenitic Weld Inspections Using Multi-Gaussian Beam Modeling

Development of Phased Array Probes for Austenitic Weld Inspections Using Multi-Gaussian Beam Modeling

3-D Modelings of Radiated Ultrasonic Wave Field from Linear and Matrix Phased Array Transducers and Comparison of Their Performances

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