The thermal effect on dynamic characteristics of composite material pipe conveying fluid

Abstract

Based on thermoelasticity, the composite material pipe is studied in this paper with the variation of thermal expansion coefficient and temperature. Considering the thermal effect, a model called elastic Bernoulli-Euler beams is developed to analysis the buckling and vibration. The partial differential equations are established by using Hamiltonian principle. The static post-buckling problem is studied by eigenvalue method after Galerkin method. By harmonic balance method, the approximate solution of strong nonlinear vibration is obtained. The effect of thermal effect on vibration is also focused. The simulation shows that the thermal effects make conveyor pipes more vulnerable to instability, and has obvious influence on the dynamic characteristics. The research content is more practical than the dynamic analysis of the conveyor pipe without considering the temperature effect.