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Dynamic response analysis and topology optimization for vibration reduction of television packaging systems under random vibration
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DOI：10.1007/s10999-026-09951-z.png)
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Abstract
En 中文
With the development of large-screen, thin LCD televisions, transportation-induced vibrations pose significant risks to low-stiffness components such as the LCD panel and diffuser plate. To address this, a high-fidelity coupled finite element model of the television-packaging system was established, and random vibration responses under power spectral density (PSD) excitation were analyzed using the modal superposition method. The results indicate that vibration energy is primarily concentrated in low-frequency ranges dominated by coupled global and local modes. The model was subsequently validated through vibration experiments, demonstrating high accuracy. Based on these results, a topology optimization method for cushioning pads was proposed to minimize low-frequency vibration transmissibility. Unlike conventional methods that focus on stiffness or local responses, this approach targets suppression of vibration energy transmission to critical components. After optimization, transmissibility decreased from 1.15 to 0.89, the maximum displacements of the LCD panel and diffuser plate dropped by 22.3% and 36.2%, and the PSD peak in the critical frequency band was reduced by 51.4%. Experimental tests confirmed reductions of 53.1% and 30.8% in acceleration responses under random and sinusoidal excitations, demonstrating the effectiveness of the proposed method in enhancing vibration protection.
Keywords:
LCD television
Transportation packaging
Random vibration
Topology optimization
Vibration reduction design
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