Analysis of the dynamic characteristics of an eccentric cylinder in axial flow

Abstract

The simple pendulum model is a fundamental and widely studied concept in physics, its movement follows a tendency to stabilize towards the side with lower gravitational potential energy. Consequently, the simple pendulum structures have been extensive applications in petroleum, aerospace machinery, and others, particularly in gravity induction and actuator systems. The utilization of this model offers versatile solutions for complex engineering challenges. The research object of this study is an eccentric cylindrical stabilized platform. A nonlinear dynamic model of the eccentric cylindrical stable platform in axial flow with variable damping is established. Due to the complexity of the analytical solution of the simple pendulum motion, we adopt the method of numerical analysis to building the simulation and analysis model. Combined with the fluid calculation and dynamics simulation methods, the motion characteristics of the eccentric cylindrical model under steady and unsteady flow fields are analyzed by adjusting the rotational speed, inclination angle, and initial pendulum angle. The experimental platform is built to analyze the motion law of the eccentric cylinder under the action of axial flow, and the experimental results of the motion law of the eccentric cylindrical platform are consistent with the numerical calculation results.