Dynamic modeling method of diaphragm coupling based on fractal theory

GAO Shuaishuai, WEN Huabing, GUO Junhua, HUANG Peng, YUAN Menghao, ZHOU Gaofeng

Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (15) : 85-91.

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PDF(2815 KB)
Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (15) : 85-91.
VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Dynamic modeling method of diaphragm coupling based on fractal theory

  • GAO Shuaishuai, WEN Huabing*, GUO Junhua, HUANG Peng, YUAN Menghao, ZHOU Gaofeng
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Abstract

Aiming at the finite element modeling problem of the dynamic characteristics of multilayer elastic diaphragm bolted joints, a method of equivalent modeling of subarea thin-layer elements is adopted, and a method is proposed to accurately calculate the material parameters of each area of subarea thin-layer elements. Taking the diaphragm coupling in the marine propulsion shaft system as an example, the accuracy of the simplified model is verified by comparing the dynamics of modal and vibration level drop between test and simulation. The research results show that: The research results show that: the subarea thin-layer elements modeling method can effectively simplify the modeling of the dynamic model of the diaphragm coupling under the consideration of bolt preload, the rough surface constructed on the basis of the fractal theory can accurately calculate the contact stiffness of the bolt joint, and the material parameters of the subarea thin-layer elements calculated by it can accurately analyze the dynamic characteristics of the multilayer elastic diaphragm bolted couplings.

Key words

subarea thin-layer elements method / bolt joints / dynamic characteristics / Normal contact stiffness / the fractal theory.

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GAO Shuaishuai, WEN Huabing, GUO Junhua, HUANG Peng, YUAN Menghao, ZHOU Gaofeng. Dynamic modeling method of diaphragm coupling based on fractal theory[J]. Journal of Vibration and Shock, 2025, 44(15): 85-91

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