HUANG X L, LIU S Q, ZHANG Y N, et al.Study on the dynamic stability of porous functionally graded conical shell[J].Journal of Henan Polytechnic University(Natural Science) ,2023,42(2):153-159.

doi:10.16186/j.cnki.1673-9787.2021040107

Received:2021/04/23

Revised:2021/07/26

Published:2023/03/25

Study on the dynamic stability of porous functionally graded conical shell

HUANG Xiaolin, LIU Siqi, ZHANG Yanning, WU Di

School of Architecture and Transportation Engineering，Guilin University of Electronic Technology，Guilin 541004，Guangxi，China

Abstract:An modified model for the effective material properties of porous functionally graded conical shell was developed to study the dynamic stability of the shell.The dynamic stability equations with the effect of an axial periodic load were derived in the frame of the classical thin shell theory.Galerkin and Bolotin methods were employed to determine the unstable region of the shell with simply supported boundaries.The effects of porosity distributions，semi-vertex angles and porosity coefficients on the dynamic stability were discussed by using parametric analysis.It was shown that the critical excitation frequency and unstable region are decreased with the increases of semi-vertex angle and material composition index，and increased with the rise of material quality component.Compared with the dynamic stability of the shell containing evenly distributed pores，that of the shell containing unevenly distributed pores was more sensitive to change porosity coefficient.Moreover，in-plane tensile forces could effectively promote the dynamic stability of the shell.

Key words:functionally graded material;conical shell;porosity;dynamic stability

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