Dynamic Simulation and Life Prediction of a Missile Fuze Board under Vibration-Shock Combined Loads

LU Ziyi; TANG Jie; LI Jing

doi:10.7643/issn.1672-9242.2026.07.004

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (7) : 35-43. DOI: 10.7643/issn.1672-9242.2026.07.004

Special Topic——Research on Application of Complex Dynamic Environment Analysis and Fine Adaptability Verification Technique for Precise Mother-Daughter UAV System

Dynamic Simulation and Life Prediction of a Missile Fuze Board under Vibration-Shock Combined Loads

LU Ziyi^a,b, TANG Jie^a,b, LI Jing^a,c,*

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Abstract

The work aims to take a certain missile fuze board as the research object to propose a method for constructing simulation conditions of vibration-shock combined loads and perform fatigue life prediction on the board. First, equivalent simplified modeling was carried out for the PBGA micro-solder joints on the board, and a simplified global finite element model was established. On this basis, multi-condition finite element simulations were conducted using the Ansys Workbench platform, with a focus on systematically comparing and analyzing the mechanical responses and fatigue life characteristics at the dangerous locations of the fuze board under single random vibration loads and vibration-shock combined loads. After the introduction of instantaneous shock loads, the stress levels at the two critical solder joints, PBGA and SOP, increased by 9.1% and 7%, respectively, while their fatigue life reductions reached 54.1% and 44.8%, respectively. This study can provide a theoretical basis and engineering support for the anti-vibration and anti-shock structural optimization design, service reliability assessment, and accurate fatigue life prediction of missile fuze boards.

Key words

combined load / finite element simulation / dynamic analysis / fatigue life of solder joint / equivalent model / fuze board

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LU Ziyi, TANG Jie, LI Jing. Dynamic Simulation and Life Prediction of a Missile Fuze Board under Vibration-Shock Combined Loads[J]. Equipment Environmental Engineering. 2026, 23(7): 35-43 https://doi.org/10.7643/issn.1672-9242.2026.07.004

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