Acoustic excitation non-contact modal testing system and method
A non-contact, modal test technology, applied in the field of mechanical measurement, can solve the problems of structural damage, affecting the accuracy of test results, etc., to achieve accurate modal parameters, good test results, and avoid structural damage.
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[0023] The technical solution of the present invention will be further described below in conjunction with the drawings.
[0024] This embodiment provides an acoustic excitation non-contact modal test system, which is composed of figure 1 Shown, including: a set of speakers 1, a signal source 2, a set of signal cables 3, a set of acoustic sensors 4 and sound power source 5, a set of scanning laser vibration measurement system 6 and a set of test cables 7; signal source 2 Send an excitation signal to the speaker 1 through the signal cable 3, which is generally a random signal. The loudspeaker 1 is directly facing the surface of the thin-plate test piece 8 and emits acoustic excitation, which causes the thin-plate test piece 8 to vibrate. The acoustic sensor 4 is used to measure the acoustic signal emitted by the speaker 1 and is output to the scanning laser vibration measurement system 6 through the test cable 7 and the acoustic power source 5. The scanning laser vibration measur...
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