Study on chaotic vibration and high vibration intensity of a multi-level partial blocks excitation system

Abstract

A multi-level partial blocks excitation system was proposed to meet the special requirement of vibration equipment. The dynamic mechanical model was analyzed using Lagrange equations to obtain angular displacement equations of higher level partial block. The instantaneous vibration intensity and amplitude were also found. The simulation test was performed using MATLAB in order to obtain the motion curves, phase-trajectory and Poincare maps of higher level partial block. Due to the fact that the existence of the initial sensitivity, nonrepeatability and complexity of the phase trajectory, and flake points set and many discrete points in Poincare maps, the vibration system exhibited many characteristics of chaotic vibration. It was found that the chaotic excitation system with a strongly nonlinear and wide frequency band could achieve some special exciting vibration properties, such as intermittent high vibration intensity, transient super-high vibration intensity and large vibrating amplitude. Based on these analyses, the vibration mill was developed. The research showed that these measured vibration intensity K À t and amplitude A À t curves were consistent with theoretical analysis and the simulation of the motion curves, phase-trajectory and Poincare maps. In the field of vibration engineering, the special inertial properties are important to overcome work barriers and solve current technological bottlenecks.

Modeling and Simulation Analysis on Threedimensional Excitation Circular Vibrating Screen

“…On other hand, this inertia force and moment of inertia also can produce cone rotary vibration of the screen surface. In addition, the angle between upper and lower eccentric blocks along with the effect of gravity make the screen body producing complex rotary type vibration of three-dimensional excitation [5][6][7]. To explore the solution of the plugging screen in the vibration screen, modeling and simulation analysis on three-dimensional excitation circle vibration screen will been taken and the influence of the changes on the main parameters like the spring stiffness, the eccentric distance of partial block, the angular velocity of exciting motor and etc.…”

Analysis of vibration from low-rigidity contact in belt grinding of blisk blade

“…Ma et al 9 presented a novel design of an inclined feeder with a chute that vibrates like a simple pendulum, and the numerical integration programmes were developed to investigate the kinematic characteristics of the feeder. Yang et al 10 analysed the dynamic mechanical model using Lagrange equations to obtain angular displacement equations of higher level partial block, and then the instantaneous vibration intensity and amplitude were also found.…”