Vibration Isolation Design and Study for Certain Aircraft Airborne Equipment Based on Rubber Damper

ZHOU Jiangbei; LI Kaixiang; BAI Chunyu; LIU Xiaochuan

doi:10.7643/issn.1672-9242.2026.09.011

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (9) : 101-107. DOI: 10.7643/issn.1672-9242.2026.09.011

Special Topic—Structural Dynamics of Aviation Equipment

Vibration Isolation Design and Study for Certain Aircraft Airborne Equipment Based on Rubber Damper

ZHOU Jiangbei, LI Kaixiang, BAI Chunyu, LIU Xiaochuan

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Abstract

Aiming at the vibration control challenge of airborne equipment for aeronautical systems, vibration is a critical limiting factor for system reliability. It is necessary to accurately investigate the dynamic characteristics of the equipment and develop an efficient vibration reduction scheme. Vibration tests and structural frequency-domain characteristic analysis were carried out to quantitatively obtain the full-band dynamic response characteristics of the equipment. Based on the load transfer path optimization theory, rubber vibration isolators were arranged at the connection nodes between the equipment and the mounting bracket to construct a multi-directional vibration isolation system adapted to the working conditions of the airborne equipment. Obvious resonance occured in the frequency band of 100-200 Hz, and the acceleration amplitude was relatively high above 100 Hz. After installing the vibration isolators, the average vibration responses in x/y/z directions were reduced by 62.3%, 70.1% and 44.3%, respectively, which realized effective suppression of vibration amplitudes in all directions. The proposed vibration isolation scheme can significantly suppress high-frequency vibration transmission, with the vibration reduction effect exceeding 44% in all three directions. The vibration response of the equipment after vibration reduction meets the vibration limit requirements specified in DO-160G and satisfies the specification assessment criteria. This research provides key technical support for improving the reliability of airborne equipment and offers a reference for the vibration reduction design of similar aeronautical equipment.

Key words

aircraft airborne equipment / vibration test / rubber damper / vibration isolation design and study / vibration control

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ZHOU Jiangbei, LI Kaixiang, BAI Chunyu, LIU Xiaochuan. Vibration Isolation Design and Study for Certain Aircraft Airborne Equipment Based on Rubber Damper[J]. Equipment Environmental Engineering. 2026, 23(9): 101-107 https://doi.org/10.7643/issn.1672-9242.2026.09.011

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