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This study quantitatively analyses the vibration attenuation performance and stress distribution of base frames with different cavity shapes, comparing them to a uniform base frame. Using Finite Element Analysis (FEA) in ANSYS Workbench, six designs uniform, square, diamond, circular, horizontal, and vertical rectangular cavities were subjected to modal, harmonic, and stress analyses under identical dynamic loading conditions. Modal analysis revealed that base frames with cavities demonstrated higher natural frequencies than the uniform frame, with the horizontal rectangular cavity showing the highest first-mode frequency of 818.28 Hz, compared to 738.29 Hz for the uniform frame. Harmonic analysis showed that the horizontal rectangular cavity reduced peak vibration amplitude by 22.19% (52.82 g) compared to the uniform frame’s 67.89 g. Stress analysis indicated that this cavity shape also minimized von Mises stress, achieving the lowest stress value of 0.16 MPa, compared to 0.39 MPa in the uniform frame. Overall, the horizontal rectangular cavity design provided superior vibration attenuation and stress distribution, making it ideal for enhancing structural durability under dynamic loads.

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Comparative Analysis of Cavity Shapes in Base Frames for Enhanced Vibration Attenuation

  • 会议论文

  • 发表日期：

    2026年

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  • Himanshu Shukla,
  • Sachin Chaturvedi,
  • S. N. Das,
  • Brajesh Panigrahi,
  • G. R. Sabareesh

摘要

This study quantitatively analyses the vibration attenuation performance and stress distribution of base frames with different cavity shapes, comparing them to a uniform base frame. Using Finite Element Analysis (FEA) in ANSYS Workbench, six designs uniform, square, diamond, circular, horizontal, and vertical rectangular cavities were subjected to modal, harmonic, and stress analyses under identical dynamic loading conditions. Modal analysis revealed that base frames with cavities demonstrated higher natural frequencies than the uniform frame, with the horizontal rectangular cavity showing the highest first-mode frequency of 818.28 Hz, compared to 738.29 Hz for the uniform frame. Harmonic analysis showed that the horizontal rectangular cavity reduced peak vibration amplitude by 22.19% (52.82 g) compared to the uniform frame’s 67.89 g. Stress analysis indicated that this cavity shape also minimized von Mises stress, achieving the lowest stress value of 0.16 MPa, compared to 0.39 MPa in the uniform frame. Overall, the horizontal rectangular cavity design provided superior vibration attenuation and stress distribution, making it ideal for enhancing structural durability under dynamic loads.