Device and method for acoustic-static combined loading test
A technology of combined loading and test equipment, applied in the direction of measuring equipment, testing of mechanical components, testing of machine/structural components, etc., can solve the problem of reducing structural acoustic fatigue life, affecting structural or material acoustic fatigue S-N curves, and large uncertainties and other problems, to achieve the effect of simple structure, convenient implementation and operation, and low test cost
Active Publication Date: 2014-09-10
CHINA AIRPLANT STRENGTH RES INST
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Problems solved by technology
[0002] At present, ordinary traveling wave tubes can only apply acoustic loads, and some structures are also subjected to static loads while being subjected to acoustic loads. The static stress generated by static loads, as the average stress, has an impact on the acoustic fatigue life, which affects the structure or material. The acoustic fatigue S-N curve, usually the tensile mean stress will reduce the acoustic fatigue life of the structure
When the static load and the acoustic load are combined to act on the structure, the stress response characteristic of the key position of the structure is that the vibration stress caused by the acoustic excitation is superimposed on the average stress caused by the static load, so there is a large uncertainty
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[0021] Below by embodiment the present invention will be further described:
[0022] see figure 2 , which is a schematic diagram of the acoustic-static combined loading test device of the present invention. The acoustic-static combined loading test device of the present invention comprises a load cell, a screw rod, an upper T-shaped bead, a test piece, a traveling wave tube, and a lower T-shaped bead. Wherein, the traveling wave tube is a back-shaped tube, the upper wall of which is left with a bolt hole for installing the screw 2, the screw rod passes through the upper wall of the traveling wave tube and is connected to the upper T-shaped bead 5, and the lower end of the upper T-shaped bead is connected to the test piece. The other end of the piece is connected to the lower T-shaped bead arranged on the lower wall of the traveling wave tube. In addition, an outlet hole is designed on the lower wall of the traveling wave tube for the extraction of strain measurement lines. ...
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The invention belongs to the combined loading test technology and specifically relates to a device and a method for an acoustic-static combined loading test. The device for the acoustic-static combined loading test comprises a force measuring sensor, a screw, an upper T-shaped compression strip, a test piece, a traveling-wave tube and a lower T-shaped compression strip, wherein the traveling-wave tube is a looped tube, a bolt hole for mounting the screw is formed in the upper wall of the traveling-wave tube, the screw is connected with the upper T-shaped compression strip after passing through the upper arm of the traveling-wave tube, the lower end of the upper T-shaped compression strip is connected with the test piece, and the other end of the test piece is connected with the lower T-shaped compression strip arranged on the lower wall of the traveling-wave tube. The device is characterized in that a nut is used for realizing the loading of static loads, different static loads are applied by use of different tightening torques, and a loudspeaker is used for implementing the loading of acoustic loads; the device is simple in structure, convenient in implementation operation and low in test cost.
Description
technical field [0001] The invention belongs to combined load loading test technology, in particular to an acoustic-static combined loading test device and method. Background technique [0002] At present, ordinary traveling wave tubes can only apply acoustic loads, and some structures are also subjected to static loads while being subjected to acoustic loads. The static stress generated by static loads, as the average stress, has an impact on the acoustic fatigue life, which affects the structure or material. The acoustic fatigue S-N curve, usually the tensile mean stress will reduce the acoustic fatigue life of the structure. When the static load and the acoustic load are combined to act on the structure, the stress response characteristic of the key position of the structure is that the vibration stress caused by the acoustic excitation is superimposed on the average stress caused by the static load, so there is a large uncertainty. Contents of the invention [0003] T...
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IPC IPC(8): G01M13/00
Inventor 王琰郭定文王秋蓉
Owner CHINA AIRPLANT STRENGTH RES INST