General prediction model of residual pretightening force of bolt group with one-step and multi-step pretightening and analysis of influencing factors from the perspective of elastic interaction
ISSN: 0264-4401
Article publication date: 6 June 2023
Issue publication date: 15 June 2023
Abstract
Purpose
The purpose is to predict the distribution of the residual pretightening force of the bolt group under the action of any initial pretightening force, and to achieve the final residual pretightening force as the target to solve the initial pretightening force value to be applied.
Design/methodology/approach
Based on the finite element method and the elastic interaction theory between bolt group, this paper establishes a prediction model for the residual pretightening force distribution of bolt group for one-step pretightening and multi-step pretightening of gasketless flange connection systems. In addition, using the general modeling method given in this paper, the prediction model of residual pretightening force of long plate bolt connection system is established, and compared with reference, which fully proves the effectiveness and universality of the general prediction model of residual pretightening force of bolt group.
Findings
The appropriate pretightening sequence, increasing the number of pretightening steps and variable amplitude loading can effectively reduce the influence of elastic interaction and improve the uniformity of residual pretightening force of the bolt group. And the selection of material, number of bolts and connected thickness of bolt connection system also has a great influence on the distribution of residual pretightening force of bolt groups.
Originality/value
The general prediction model for the residual pretightening force of bolt group of connecting structural components considering elastic interaction given in this paper can provide a reference for the design and optimization of the bolt assembly process of the rotor system and the casing system in aero-engine and the prediction of the performance of the connecting system.
Keywords
Acknowledgements
The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (NSFC) (Grant No. 51905354); Natural Science Foundation of Liaoning Province of China (Grant No. 2022-MS-298); Scientific Research Fund of Liaoning Education Department (Grant No. LJKMZ20220531).
Citation
Pan, W., Li, X., Sun, L., Song, H. and Wang, M. (2023), "General prediction model of residual pretightening force of bolt group with one-step and multi-step pretightening and analysis of influencing factors from the perspective of elastic interaction", Engineering Computations, Vol. 40 No. 4, pp. 921-956. https://doi.org/10.1108/EC-12-2022-0731
Publisher
:Emerald Publishing Limited
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