The device features by its compact and solid structure as well as its small volume(50×55×45mm~3). It has passed the vibration test at frequencies between 32～500 cps and with an amplitude of 2mm as well as superload of 8g.
The paper presents the mechanics model of vibration for VWWJ-19/7.8 type air compressor without foundation and oil lubrication, and conducts the program calculation and Vibration test.
The paper has introduced some examples of test technology application, such as the petrol engine test, the diesel engine test, the vibration test, the oil sample analysis, the unusual sound of engine test, the chassis output power test and the chassis brake test.
Based on the experimental modal analysis and the vibration test analysis of motorcycle frame and engine,the author obtains the resonance frequency of the frame.
The simulation study shows that the electro-hydraulic servo vibration bable system,designed using the method presented here, can realize tracking control to penodic vibration test signals.
The simulation study shows that the electro-hydraulic servo vibration table system, designed using the method pres- ented here, can realize trcking control to periolic vibration test signals.
Free vibration test for some sample beams were also carried out to determine their fundamental frequencies.
Method of obtaining a feedback signal for correcting the characteristics of an electrodynamic vibration test bed
The adhesive performance of aluminized polyester films has been assessed by use of an ultrasonic vibration test.
The use of the vibration test may provide a substitute for or augment the routine use of radiography for in vivo evaluation and monitoring of bone healing.
The findings revealed that the results of bone photodensity and the mechanical three-point test are highly and positively correlated with the results of the vibration test.
This paper deals with the basic principles of the vibration and shock isolation in accordance with the basic theory. Three aspects are considered here: 1. The isolation theory of such periodic vibrations as: 1) Single-degree-of-freedom system; 2) Uncoupled two-degree-of-freedom system; 3) Coupled two-degree-of-freedom system; 4) Multi-degree-of-freedom system; 5) High frequency excitation system; 6) Non-rigid structure system. 2. Theory of random vibration isolation. 3. Theory of shock isolation. The theory...
This paper deals with the basic principles of the vibration and shock isolation in accordance with the basic theory. Three aspects are considered here: 1. The isolation theory of such periodic vibrations as: 1) Single-degree-of-freedom system; 2) Uncoupled two-degree-of-freedom system; 3) Coupled two-degree-of-freedom system; 4) Multi-degree-of-freedom system; 5) High frequency excitation system; 6) Non-rigid structure system. 2. Theory of random vibration isolation. 3. Theory of shock isolation. The theory involved here has been partly proved by the vibration test of multi-degree-of-freedom system. In the last part of the paper, are discussed the principles for selection and design of the shock and vibration isolators.
By using two YIG single-crystals as resonator, a magnetically-tunable bandpass filter for 3cm waveguides has been constructed. The coupling between cavities is of side-wall-coupled Type. The insertion loss is lower than 2db for a tunable range of frequency of f_0±0.5 GHz within the whole X band except at the high fringe sideband frequency where it is 2.4db. The 3db Bandwidth is 30±5MHz. The stop-band attenuation (f_0±100MHz) is over 35db except individual frequency points. The device features by its compact...
By using two YIG single-crystals as resonator, a magnetically-tunable bandpass filter for 3cm waveguides has been constructed. The coupling between cavities is of side-wall-coupled Type. The insertion loss is lower than 2db for a tunable range of frequency of f_0±0.5 GHz within the whole X band except at the high fringe sideband frequency where it is 2.4db. The 3db Bandwidth is 30±5MHz. The stop-band attenuation (f_0±100MHz) is over 35db except individual frequency points. The device features by its compact and solid structure as well as its small volume(50×55×45mm~3). It has passed the vibration test at frequencies between 32～500 cps and with an amplitude of 2mm as well as superload of 8g. The temperature shift is about range of 1.2～1.5MH_2 per degree.
This paper synthesizes and analyses the foreign specifications of environmental vibration test, with comparison emphaticall made of different specefications of random vibration test. Finally, it gives views on the trend of development in the foreign specifications of environmental vibration test.
vibration test
振动试验
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