Dynamic Modeling Method of Bolted Joint Interfaces Based on Nonlinear Transversely Isotropic Virtual Material

doi:10.12068/j.issn.1005-3026.2021.08.008

Abstract

Abstract: To simulate the nonlinear dynamic characteristics of bolted joint， a dynamic modeling method of bolted joint based on nonlinear transversely isotropic virtual material is proposed. Based on the finite element method， 8-node solid elements are used to construct the connected parts and the bolted joint that is simulated by the transversely isotropic virtual material， and the virtual material is fixed to the connected parts. The nonlinear virtual material is used to simulate the nonlinear stiffness characteristics of the bolted joint under different external harmonic excitation forces. In order to make the calculation of the nonlinear model more accurate， the nonlinear transversely isotropic virtual material is partitioned， and the virtual material parameters of each region are determined by the deformation of the virtual material in the region. Finally， the dimension of the model is reduced partly and the amplitude frequency response of the model is solved in time domain. The feasibility and effectiveness of the as-proposed modeling method are verified by comparing the theoretical calculation results with that of the experiments.

Key words: bolted joint; virtual material; finite element method; nonlinear stiffness; partition modeling; local dimensionality reduction

CLC Number:

TH131.1

MA Hui， YU Ming-yue， GAO Ang， ZHAO Chen-guang. Dynamic Modeling Method of Bolted Joint Interfaces Based on Nonlinear Transversely Isotropic Virtual Material[J]. Journal of Northeastern University(Natural Science), 2021, 42(8): 1111-1119.

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