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Lateral Error Simulation Analysis of Low-Frequency Large Displacement Standard Vibration Table

Author(s)

Hao Hou¹, Haolin Sun²,*, Rilong Li¹

Affiliation(s)

¹Beijing Great Wall Metrology & Test Technology Institute, AVIC, Beijing, China ²School of Mechatronical Engineering of Beijing Institute of Technology, Beijing, China *Corresponding Author

Abstract

This study addresses the lateral vibration error caused by the bending of guide rails under the gravitational load of the platform in the calibration technology of civil aircraft visual vibration measurement. We establish a systematic analysis method based on "simplified model theoretical derivation and validation through actual structure simulation." Simplification and modeling are performed using SolidWorks, while simulation analyses are conducted in Abaqus for various frequency conditions, covering the full frequency range from 0.1 Hz to 200 Hz (selecting 17 characteristic frequency points at 1/3 octave intervals). The focus is on quantifying the lateral displacement errors in the Y direction (perpendicular to the table surface) resulting from rail bending. The simulation results indicate that the maximum Y-direction displacement at the reference points of the vibration table surface is consistently on the order of 10⁻⁹ m, with corresponding maximum bending angles below 0.000002°. This error has a negligible effect on the Z-direction (table motion trajectory) vibration measurement results. This research provides a crucial error assessment basis for the calibration of visual vibration measurement systems, effectively supporting the advancement of noise field calibration techniques and offering a standardized simulation process for error analysis of similar high-precision vibration equipment.

Keywords

Low-Frequency Large Displacement Vibration Table; Lateral Error; Abaqus Simulation; Rail Bending; Civil Aircraft Vibration Calibration

References

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