Results 271 to 280 of about 145,679 (305)
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Impact hammer test of ITER blanket remote handling system
Fusion Engineering and Design, 2016Abstract 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 +5 more
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Fouling Detection based on Vibration Analysis with the Hammer Impact Test
2007 IEEE Instrumentation & Measurement Technology Conference IMTC 2007, 2007Fouling detection is a persistent and relevant problem for the chemical, oil, food and pharmaceutical industries. The fouling process is the slow, unwanted layer deposition of heavy organic and other dissolved solid material out of transported fluids or suspensions onto inner wall surfaces in fluid transport system over an extended period of time. This
Jaidilson Jo da Silva +3 more
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On the prediction of impact noise, X: The design and testing of a quietened drop hammer
Journal of Sound and Vibration, 1986Part V in this series showed that the technique of predicting overall noise levels ( L eq per event) from vibration levels in a drop hammer produces surprisingly accurate results, allowing a good estimate of the contribution of each component to the overall noise.
E.J. Richards, I. Carr
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Unbiased expression of FRF with exponential window function in impact hammer testing
Journal of Sound and Vibration, 2004Abstract The exponential window function is widely used in impact hammer testing to reduce leakage errors as well as to get a nice S/N ratio. The larger the exponential decay rate of the window is, the more effectively the leakage errors are reduced.
Se Jin Ahn, Weui Bong Jeong, Wan Suk Yoo
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A NEW APPROACH TO IMPACT TESTING INSTRUMENTATION USING AN ELECTRONIC SLAVE HAMMER
Mechanical Systems and Signal Processing, 1997Abstract An electronic slave hammer is used to improve the performance of impact testing. The electronic programmer as well as the power electronic circuits are presented. The geometry of the piston tip of the hammer and on duration of contact between the tip and the structure is discussed.
I. Tawfiq, T. Vinh, T. Chouychai
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Hot Spot Formation in Mock Materials in Impact Sensitivity Testing by Drop Hammer
Propellants, Explosives, Pyrotechnics, 2017AbstractPowder and granulated sugars were exposed to the drop hammer impact test configured with 120‐ and 180‐grit Si/C sandpapers. The sugars were selected as mock materials for HMX (Octahydro‐1,3,5,7‐tetranitro‐1,3,5,7‐tetrazocine). The drop heights ranged from 24.2 to 40.7 cm.
John G. Reynolds +4 more
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Design of the angle hammers impact test system of the automobile fuel tank
2009 International Conference on Mechatronics and Automation, 2009This paper introduces the design method of the angle hammers impact test system of the automobile fuel tank in detail. We have discovered the appropriate algorithm and have achieved the request precision through the computation of the data. We used the single chip of ATmega8 and a series of electronic elements to complete the control of the impact test
null Jiang Tao +2 more
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Single Cutter Impact Tests Investigate Deep-Well Hammer-Drilling Performance
Proceedings of SPE Annual Technical Conference and Exhibition, 2005Abstract The use of a percussion hammer can provide high penetration rates through hard rocks when air drilling. The work of this paper was partly sponsored by the US Department of Energy to develop hammer drilling techniques for drilling deep hard rocks, using real drilling muds.
S. Green +5 more
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Cracking Assessment of Reinforced Concrete Slab Using Impact Hammer Test
Journal of Structural Monitoring and Built EnvironmentImpact hammer test is a vibration-based monitoring method used to detect cracking or damage in concrete structures by observing the vibration behavior such as the natural frequency, mode shapes and damping ratio. Damage or cracks in the structure can cause structure failure.
Nuramieza Mohd Yazid +1 more
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