Modal Analysis of Airborne Equipment Mounting Rack

Zhang, Jing Dong; Qi, Xue; Tang, Rui

doi:10.4028/www.scientific.net/amm.312.282

Cited by 4 publications

(1 citation statement)

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“…The external vibration generally has the characteristics of wide frequency band and large vibration magnitude, covering vibrations of different magnitudes from 5 to 2000 Hz (Chinese People's Liberation Army, 2009). The vibration of the internal optical components is caused by the zoom, focus and dimming of the optical system itself, which directly or indirectly degrade the internal optical sensors of the optoelectronic equipment or its imaging principle Kenned and Rhonda, 2003), resulting in blurred imaging and inaccurate capture of targets (Jing et al, 2013), and at the same time reduce the service life and reliability of the optical components. Therefore, it is of great significance to study the vibration isolation law of airborne equipment in the airborne environment.…”

Section: Introductionmentioning

confidence: 99%

Vibration response analysis of a two-stage vibration isolation system for large airborne equipment

Zhu,

Lv,

et al. 2023

MMMS

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PurposeThis paper aims to propose a two-stage vibration isolation system for large airborne equipment to isolate aircraft vibration load.Design/methodology/approachFirst, the vibration isolation law of the discrete model of large airborne equipment under different damping ratios, stiffness ratios and mass ratios is analyzed, which guides the establishment of a three-dimensional solid model of large airborne equipment. Subsequently, the vibration isolation transfer efficiency is analyzed based on the three-dimensional model of the airborne equipment, and the angular and linear vibration responses of the two-stage vibration isolation system under different frequencies are studied.FindingsFinally, studies have shown that the steady-state angular vibration at the non-resonant frequency changes little. In contrast, the maximum angular vibration at the resonance peak reaches 0.0033 rad, at least 20 times the response at the non-resonant frequency. The linear vibration at the resonant frequency is at least 2.14 times the response at the non-resonant frequency. Obviously, the amplification factor of linear vibration is less than that of angular vibration, and angular vibration has the most significant effect on the internal vibration of airborne equipment.Originality/valueThe two-stage vibration isolation equipment designed in this paper has a positive guiding significance for the vibration isolation design of large airborne equipment.

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Section: Introductionmentioning

confidence: 99%