Results 261 to 270 of about 145,655 (304)

Producing unexpected emotional expressions in others reduces one's own agency. [PDF]

Sci Rep
Ari I, De Tommaso D, Wykowska A.
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Rayleigh damping parameters estimation using hammer impact tests

Mechanical Systems and Signal Processing, 2020
Abstract Structural Health Monitoring (SHM) systems for aerospace applications are becoming more prevalent and its potential cost-benefit relation is rapidly improving as more structures that were traditionally made with metallic materials are gradually being replaced by composites.
Fernando Sánchez Iglesias, Antonio Fernández López   +1 more
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Multiple Impact Phenomenon in Impact Hammer Testing: Theoretical Analysis and Numerical Simulation

Acta Mechanica Solida Sinica, 2021
As conducting an impact hammer testing during experimental modal analysis, the multiple impact phenomenon must be avoided. It is generally recognized that the multiple impact phenomenon is induced by the tester’s improper operation and can be avoided through more careful operation. This study theoretically and numerically investigates the whole process
Junyin Li, Ken Lin, Yanchao Hu, Yuliang Yang, Yong Wang, Zhilong Huang   +5 more
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Impact test hammer

The Journal of the Acoustical Society of America, 1992
An impact test hammer includes a cylindrical handle having opposite first and second end portions and a hollow interior, a sensor portion fixed to the first end portion of the handle, and a grip portion fixed to the second end portion of the handle. An elastic striking portion is fixed to an outer periphery of the sensor storage portion, and an impact ...
Kiyoshi Umemura, Teruo Irie
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Impact hammer test of ITER blanket remote handling system

Fusion Engineering and Design, 2016
Abstract An impact hammer test of the full-scale mock-up of the ITER blanket remote handling system (BRHS) was carried out to validate the results of the seismic analysis of the BRHS which were performed using a finite element (FE) model. As the FE analysis of the BRHS predicted a vertical mode ∼8 Hz, which coincides with a major natural frequency of
Yuto Noguchi, Takahito Maruyama, Kenichi Ueno, Masafumi Komai, Nobukazu Takeda, Satoshi Kakudate   +5 more
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Impact hammer testing of a railway track

2017
Non-destructive dynamic testing such as excitation techniques that use an instrumented hammer and mounted accelerometers has been previously employed for evaluation of structural condition of the track. This paper shows in-situ application of impact hammer testing on an inactive railway line.
Balic, E., McNally, C., Hester, D.
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Fouling detection using hammer impact test and wireless comunication

2011 IEEE International Instrumentation and Measurement Technology Conference, 2011
There is a persistent problem that continues to be a relevant demand for the chemical, petroleum, food and pharmaceutical industries. This problem is the fouling detection in systems of ducts. This work shows how the previous tests to develop a platform for detecting fouling of pipes analyze specific locations using the impact hammer test with wireless
L. C. Lemos, J. M. R. Souza Neto, J. J. Silva, J. S. Rocha Neto   +3 more
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Modal testing on a limited budget: Analysis of instrumented hammer alternatives for impact testing

The Journal of the Acoustical Society of America, 2023
In recent years, as the use of numerical modeling has increased, organizations have frequently scaled back their experimental capabilities. Often equipment and expertise are no longer available when modal correlation measurements are required. This presentation is part of a planned series examining a minimalist approach to modal testing.
Hubert S. Hall, Curtis Larsen
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Investigation on Impact Hammer Testing with Different Types of Hammer Tip for Welded Thin Plate

Advanced Science Letters, 2017
Modal testing using impact hammer had been used extensively in various industries to analyze the dynamic properties of the structure. Impact testing become famous due to their advantages for instances; fast, compatible for measurements in the field and relatively inexpensive.
S. N Zahari, M. S. M Sani
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Multiple Reference Impact Testing for Bridge Assessment with Drop Hammer

Advanced Materials Research, 2012
A new drop hammer was designed and used for multiple reference impact testing of two bridges. The drop hammer utilizes a multiple-rebound control system for successfully applying a single impact with repeatable high-level force for bridge testing. Signal analysis results indicate that the drop hammer provides a higher signal-noise ratio and a better ...
Yu Juan Liao, Yun Zhou, Peng Qin
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