Hollow Axle Ultrasonic Crack Detection for Conventional Railway Vehicles

Makino, Kazunari; Yohso, Jiro; Sakamoto, Hiroshi; Ishiduka, Hiromichi

doi:10.2219/rtriqr.46.78

Cited by 7 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To guarantee the functionality of these products, the use of ultrasonic non-destructive testing (UNDT) makes significant sense for quality assurance. [1][2][3] In typical cylindrical ultrasonic testing, a transducer moves over the surfaces of cylinders along circular trajectories, recording the reflection echo signals and imaging the inner defects. The ultrasonic beam is assumed to be very narrow and to only illuminate regions of the object located directly in front of the transducer.…”

Section: Introductionmentioning

confidence: 99%

Frequency domain synthetic aperture focusing technique for variable-diameter cylindrical components

Jin

et al. 2017

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

Ultrasonic non-destructive testing (UNDT) plays an important role in ensuring the quality of cylindrical components of equipment such as pipes and axles. As the acoustic beam width widens along propagation depths, the diffraction of acoustic wave becomes serious and the images of defects will be interfered with. To precisely evaluate the dimensions of defects and flaws concealed in components, the synthetic aperture focusing technique (SAFT) is introduced to enhance the image resolutions. Conventional SAFTs have been successfully implemented for the ultrasonic imaging of normal cylinders, while solutions for complex ones, such as variable-diameter cylinders, are still lacking. To overcome this problem, a frequency-domain SAFT for variable-diameter cylindrical components is proposed. This algorithm is mainly based on acoustic field extrapolation, which is modified from cylindrical phase shift migration with the aid of split-step Fourier. After a series of extrapolations, a high-resolution ultrasound image can be reconstructed using a particular imaging condition. According to the experimental results, the proposed method yields low side lobes and high resolutions for flat transducers. Its attainable angular resolution relies on the transducer diameter D and scanning radius R and approximates D/(2R).

show abstract

Section: Introductionmentioning

confidence: 99%

Frequency domain synthetic aperture focusing technique for variable-diameter cylindrical components

Jin

et al. 2017

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…Due to high speed operation, the importance of the hollow axles ultrasonic inspection is increasingly obvious in the operation and maintenance of high-speed trains [2], [3]. Fig.…”

Section: Introductionmentioning

confidence: 99%

The influence of coupling layer thickness on hollow axles ultrasonic testing

Dong

Zou

Sun

et al. 2015

2015 International Conference on Control, Automation and Robotics

View full text Add to dashboard Cite

The thickness of coupling layer between the hollow axle inner wall and the probe wedge may vary during actual ultrasonic inspection. To study the influence of coupling layer thickness on the hollow ultrasonic inspection, the simulation models with different probe angles and different thicknesses of coupling layer were established with COMSOL Multiphysics. Flaw echoes from 38°and 45°probes under various coupling thickness were calculated and analyzed in details. A special experimental system was designed to validate the simulation results. Both simulation and experiment show that the coupling thickness variation may impact the reliability of ultrasonic testing results when the coupling thickness is less than 0.9mm.

show abstract

“…Therefore it is critical under these conditions to reduce the unsprung mass of the vehicle wheel. This makes the hollow axle become an integral part of a high-speed train [1]. The obvious augment of the dynamic stress between wheel and rail, along with the speed-up, increases the damage probability of axles and brings a great potential safety hazard to the operation of high-speed train [2].…”

Section: Introductionmentioning

confidence: 99%

Simulation analysis of ultrasonic inspection of hollow axle with different segments

Qu-zhu

et al. 2015

2015 International Conference on Control, Automation and Robotics

View full text Add to dashboard Cite

Hollow axle has replaced the traditional solid axle in high-speed trains due to the increased operational speed. The ultrasonic inspection on hollow axles must be conducted to ensure the safe operation of high-speed trains. The hollow axle can be artificially divided into different segment based on the shape and size of different axle segments including the transition arc section. Different inspection results from these axle segments can be obtained due to the different sound path and the different dimension of the transition arc. Simulation models about different axle segments were established by means of COMSOL Multiphysics. The difference of the simulation results, from different axle segments tested by probes with different angles and directions, are discussed, which may provide guidance for the setup of gate and selection of probes while carrying out actual ultrasonic inspection on hollow axle.

show abstract

Hollow Axle Ultrasonic Crack Detection for Conventional Railway Vehicles

Cited by 7 publications

References 0 publications

Frequency domain synthetic aperture focusing technique for variable-diameter cylindrical components

Frequency domain synthetic aperture focusing technique for variable-diameter cylindrical components

The influence of coupling layer thickness on hollow axles ultrasonic testing

Simulation analysis of ultrasonic inspection of hollow axle with different segments

Contact Info

Product

Resources

About