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Volume 41 Issue 12
Dec.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(12): 2269-2279.
YAO Xingyu, WANG Jianjun, ZHAI Xueet al. Modeling method of bolted joints of aero-engine based on thin-layer element[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2269-2279. doi: 10.13700/j.bh.1001-5965.2014.0796(in Chinese)
Citation: YAO Xingyu, WANG Jianjun, ZHAI Xueet al. Modeling method of bolted joints of aero-engine based on thin-layer element[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2269-2279. doi: 10.13700/j.bh.1001-5965.2014.0796(in Chinese)
shu

Modeling method of bolted joints of aero-engine based on thin-layer element

doi: 10.13700/j.bh.1001-5965.2014.0796

  • School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 17 Dec 2014
  • Rev Recd Date: 13 Mar 2015
  • Publish Date: 20 Dec 2015
    Abstract
  • The bolted joints, which are commonly used in aero-engine structure, have important influences on dynamic characteristics of aero-engine. The thin-layer element method can simulate complex connection structure and maintain the structure integrity. Based on the thin-layer element method, the modeling principles of aero-engine bolted joints was studied and the influence law of material parameters of thin-layer element on bolted joints stiffness was researched. Then the material parameters of thin-layer element through theoretical derivation were determined. Finally it was applied to actual structure and compared with detailed finite elements model so as to verify the correctness and aspect of this method. The results indicate that the thin-layer element method can simulate aero-engine bolted joints excellently; the axial and bending stiffness are decided by axial elastic modulus of thin-layer element, and the shear stiffness is decided by the xy and xz plane shear modulus of thin-layer element; the material parameters of thin-layer element can be expressed by structural parameters of bolted joints.

     

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