A method for eliminating the influence of a suspension support in a frequency response function for a free modal test
The invention discloses a method for eliminating the influence of a suspension support in a frequency response function fora free modal test, which generally adopts a soft rope or a soft spring to carry out suspension support on a tested structure in the free modal test, and approximately simulates...
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| Hauptverfasser: | , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a method for eliminating the influence of a suspension support in a frequency response function fora free modal test, which generally adopts a soft rope or a soft spring to carry out suspension support on a tested structure in the free modal test, and approximately simulates a free boundary condition; However, the suspension bearing introduces additional rigidity and damping to the test structure, thereby bringing a certain degree of influence to the measured frequency response function. The invention relates to a method for eliminating the influence of a suspension support in a frequency response function for a free modal test. According to the method, under the condition that the bearing stiffness and the bearing damping are given, the influence of the bearing stiffness and the damping on a measured frequency response function can be eliminated by measuring the frequency response function related to a suspension point, and the frequency response function of afree structure is accurat |
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