Topology Optimization Design and Experimental Verification of Vibration Fixture for Airborne Products

SONG Yunbiao; CHEN Zhaohai; LI Hengyu

doi:10.7643/issn.1672-9242.2026.06.010

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (6) : 107-115. DOI: 10.7643/issn.1672-9242.2026.06.010

Aviation and Aerospace Equipment

Topology Optimization Design and Experimental Verification of Vibration Fixture for Airborne Products

SONG Yunbiao, CHEN Zhaohai, LI Hengyu

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Abstract

The study aims to conduct a study on the topology optimization design, simulation analysis for the vibration fixtures based on ANSYS Workbench, and test verification of vibration fixtures, tomeet the high-level test requirements of an airborne product vibration test, and solve the problems such as overweight and poor dynamic transmission performance in traditional vibration fixture design. An inverted conical preliminary fixture model was designed using 2A12 aluminum alloy, and its dynamic characteristics were determined through modal analysis. On this basis, three topology optimization schemes were constructed by the variable density method (maximizing the first modal frequency, maximizing the fourth modal frequency, and minimizing mass). The model reconstruction was completed by combining the machining processes and engineering experience. The dynamic characteristics and structural strength of the reconstructed model were verified through harmonic response analysis and random vibration analysis. Finally, the feasibility of the reconstructed model was verified through physical vibration tests. The mass of the reconstructed fixture was reduced to 56.91 kg, which met the requirement of below 60 kg, and the weight reduction rate was 18.27%. The first modal frequency in the Z direction was 1 688.7 Hz, which satisfied the requirements for fixture design. Harmonic response analysis indicated that the resonance peak frequency was basically consistent with the first modal frequency in the Z direction. Random vibration analysis showed that the maximum response acceleration and stress in the Z direction met the structural strength requirements. In the physical test, the control curve of the sine sweep test was stable at 1g, and the maximum peak was 1.216 8g. For the random vibration test, the RMS value of the control curve was 28.124 6g, indicating that its dynamic transmission characteristics were good. This study verifies the applicability and effectiveness of the topology optimization method in vibration fixture design. The lightweight design of the fixture is realized, while ensuring structural stiffness, which can effectively shorten the design cycle and reduce the test costs. It provides a practical engineering reference for the design and optimization of similar vibration fixtures.

Key words

dynamic analysis / topological optimization / modal analysis / lightweight design / vibration fixture / vibration test

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SONG Yunbiao, CHEN Zhaohai, LI Hengyu. Topology Optimization Design and Experimental Verification of Vibration Fixture for Airborne Products[J]. Equipment Environmental Engineering. 2026, 23(6): 107-115 https://doi.org/10.7643/issn.1672-9242.2026.06.010

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