Shock Response of Shipborne Electrical Cabinets

YOU Zhongyou; XIE Teng; WANG Haikun; WU Weidi

doi:10.7643/ issn.1672-9242.2025.12.009

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (12) : 68-77. DOI: 10.7643/ issn.1672-9242.2025.12.009

Ships and Marine Engineering Equipment

Shock Response of Shipborne Electrical Cabinets

YOU Zhongyou¹, XIE Teng^1,2, WANG Haikun^1,2,*, WU Weidi¹

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Abstract

To investigate the dynamic response characteristics of typical shipborne electrical cabinets under impact loads, the work aims to establish a dynamic model that incorporates the nonlinear impact behavior of wire rope vibration isolators and elucidate the distribution patterns of internal shock environments within the cabinets. The nonlinear parameters of the wire rope vibration isolator were determined based on experimental data and the mass equivalence method. A finite element model of a representative shipborne electrical cabinet was developed, and explicit dynamic methods were employed for dynamic simulations. Through modal analysis, the first six vibration mode characteristics of the cabinet were obtained. The accuracy of the model was validated through vertical impact tests, with calculation errors under various operating conditions remaining below 10%. Shock response spectrum analysis revealed that displacement spectral values were relatively high in the low-frequency range at the bottom area of the cabinet, while acceleration spectral values were more pronounced in the high-frequency range. The shock environment experienced by the cabinet door panel and component mounting plate was largely similar. However, the bottom region was subject to a more severe shock environment. Significant variations exist in the internal shock environment distribution, with installation location playing a decisive role in component shock response. Furthermore, the frequency matching characteristics of the vibration isolation system, especially the low-order natural frequencies of 12.5-29.9 Hz, significantly affect the overall shock resistance performance. These findings provide a theoretical foundation for identifying critical components and optimizing their layout in anti-impact design for shipborne equipment.

Key words

shipborne equipment / wire rope vibration isolator / asymmetric hysteresis / FEM / explicit dynamic / shock environment

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YOU Zhongyou, XIE Teng, WANG Haikun, WU Weidi. Shock Response of Shipborne Electrical Cabinets[J]. Equipment Environmental Engineering. 2025, 22(12): 68-77 https://doi.org/10.7643/ issn.1672-9242.2025.12.009

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