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<p>Interface assembly deformation is a critical factor affecting the accuracy of precision mechanical systems such as three-floor gyroscopes. Current methods for calculating this deformation typically address only simple continuum structures and often overlook the multipart coordination inherent in discontinuous structures. Moreover, the interaction of assembly loads introduces discrepancies between theoretical calculations and actual outcomes. To address the challenge of accurately calculating interface assembly deformation, this paper constructs a new interface assembly deformation prediction model for discontinuous structures by comprehensively considering the influence of the spigot and bolt group coordination structure. First, a contact state calculation model of the joint surface under spigot precompression was established on the basis of higher-order beam theory to obtain the contact state of the joint surface under spigot precompression. Further, considering the structural deformation coordination relationship and the contact state of the joint surface, a calculation method for interface assembly deformation was proposed. Using the air-floating rotor structure of the three-floated gyroscope as an example, the experimental results revealed that the calculation error of the interface assembly deformation prediction model was less than 8&#xa0;μm, verifying the accuracy of the calculation method. Finally, based on the interface assembly deformation prediction model, the interface assembly deformation law and normal assembly deviation of the air-bearing rotor of the triple-floated gyroscope were obtained under different amounts of spigot interference, and the results revealed that the interface assembly deformation asymmetry increased by more than four times with increasing spigot interference, and the gyroscope pointing deviation increased by more than 0.029°. This paper provides a new interface assembly deformation prediction model for multibolt-spigot discontinuous structures, offering significant theoretical guidance and practical value for enhancing the precision and performance stability of systems such as three-floor gyroscopes.</p>

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Innovative prediction model for interface assembly deformation of a three-floated gyroscope spigot structure

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Yang Yang,
  • Bo Yuan,
  • Xiaokai Mu,
  • Qingchao Sun,
  • Rongxuan Zhao

摘要

Interface assembly deformation is a critical factor affecting the accuracy of precision mechanical systems such as three-floor gyroscopes. Current methods for calculating this deformation typically address only simple continuum structures and often overlook the multipart coordination inherent in discontinuous structures. Moreover, the interaction of assembly loads introduces discrepancies between theoretical calculations and actual outcomes. To address the challenge of accurately calculating interface assembly deformation, this paper constructs a new interface assembly deformation prediction model for discontinuous structures by comprehensively considering the influence of the spigot and bolt group coordination structure. First, a contact state calculation model of the joint surface under spigot precompression was established on the basis of higher-order beam theory to obtain the contact state of the joint surface under spigot precompression. Further, considering the structural deformation coordination relationship and the contact state of the joint surface, a calculation method for interface assembly deformation was proposed. Using the air-floating rotor structure of the three-floated gyroscope as an example, the experimental results revealed that the calculation error of the interface assembly deformation prediction model was less than 8 μm, verifying the accuracy of the calculation method. Finally, based on the interface assembly deformation prediction model, the interface assembly deformation law and normal assembly deviation of the air-bearing rotor of the triple-floated gyroscope were obtained under different amounts of spigot interference, and the results revealed that the interface assembly deformation asymmetry increased by more than four times with increasing spigot interference, and the gyroscope pointing deviation increased by more than 0.029°. This paper provides a new interface assembly deformation prediction model for multibolt-spigot discontinuous structures, offering significant theoretical guidance and practical value for enhancing the precision and performance stability of systems such as three-floor gyroscopes.