Mechanical Vibration and Shock Measurements |
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Page 229
... load was raised from O until fracture which occurred at about 16 kN as compared to an expected value of 17 kN . The specimen was quiet below the yield point . This phenomenon , that the acoustic emis- sion , once taken out of the ...
... load was raised from O until fracture which occurred at about 16 kN as compared to an expected value of 17 kN . The specimen was quiet below the yield point . This phenomenon , that the acoustic emis- sion , once taken out of the ...
Page 230
... Load 1000 kP- ( 50 kP / mm2 ) -750 -5000 250 Date Ch 2 Sign Date OP 2100 OP 2100 790480 Fig.9.20 . Load , peak output and " weighted sum " as a function of time for carbon - fibre braid The curves show that while the tensile load is ...
... Load 1000 kP- ( 50 kP / mm2 ) -750 -5000 250 Date Ch 2 Sign Date OP 2100 OP 2100 790480 Fig.9.20 . Load , peak output and " weighted sum " as a function of time for carbon - fibre braid The curves show that while the tensile load is ...
Page 242
... load to 7.5 kHz 30 g , 294 m / s2 1.73 lb , 0.785 kg load to 5 kHz 10 g , 98 m / s2 8.4 lb , 3.8 kg load to 5 kHz 5 g , 49 m / s2 18.4 lb , 8.35 kg load to 5 kHz 2.5 g , 25 m / s2 38.4 lb , 17.4 kg load to 5 kHz 10 1 10 Hz 20 50 100 200 ...
... load to 7.5 kHz 30 g , 294 m / s2 1.73 lb , 0.785 kg load to 5 kHz 10 g , 98 m / s2 8.4 lb , 3.8 kg load to 5 kHz 5 g , 49 m / s2 18.4 lb , 8.35 kg load to 5 kHz 2.5 g , 25 m / s2 38.4 lb , 17.4 kg load to 5 kHz 10 1 10 Hz 20 50 100 200 ...
Contents
INTRODUCTION | 13 |
CHARACTERISTICS OF VIBRATION AND SHOCK | 20 |
RESPONSE OF MECHANICAL SYSTEMS | 40 |
Copyright | |
13 other sections not shown
Common terms and phrases
acceleration accelerometer Acoustic Emission amplitude application averaging axis balancing band bandwidth Brüel & Kjær calibration Charge Amplifier curve damping decibel degree-of-freedom system digital filter displacement dynamic range effects element equation equipment example excitation fatigue force frequency analysis frequency components Frequency Hz frequency range frequency response frequency spectrum function harmonic high frequency impedance input instruments integration Level Recorder limit linear load machine mass mechanical impedance Mechanical vibration method mm/sec modes monitoring motion mounted noise non-linear normally obtained octave output parameters peak piezoelectric preamplifier quency random signals random vibrations real-time resonant frequency rotating rotor S-N curve scale sensitivity Shock and Vibration shock pulse shown sinusoidal spectra spectral density spring structure techniques tion transducer transient transmissibility typical unbalance values velocity vibration and shock vibration isolation vibration level vibration measurements Vibration Meter vibration signals vibration test visco-elastic