Experimental Study On Nonlinear Vibration Of Transmission Belt System

Drive belt is very important in the mechanism energy transmission system because ofits advantages and which is widely used in many engineering fields. However, unexpectedvibrations occur when the drive belt running, for it is made of soft rubber or other polymermaterials, and for it has a structure of large span. The vibrations will cause the imprecisionand jiggles of the transmission and abrasions of the apparatus, these defects have limitedits applications. In order to perform the vibration control system，the transmission beltshould be has an intensive analysis. It has high application value to study nonlineardynamics of the visco-elastic conveyer belt and its controllable topic.In this paper, nonlinear dynamics of the visco-elastic conveyer belt are investigatedby experiments.The main researches focused as follows:Present achievements of axially moving string model were introduced, and then wesummarized the research results on experiments study of nonlinear dynamics.Models of visco-elastic material were summarized, and nonlinear dynamic equationsof visco-elastic conveyer belt was derived by Newton second law with the Kelvin model.we set up an experimental platform for testing the transverse vibration and introduceits working principle. The experimental system consists of three parts, machinery part,measurement part and control part. Machinery part includes belts, driving wheel, drivenwheel and the servo motor and its controller. Measurement part includes laserdisplacement sensor and sensor controller. Control part is a computer.We made a study on responses to the non-linear vibration of synchronous belt at theuniform rotation and around a constant speed separately. Base on the experiment, theoryperiodic motion, period-doubling motion and chaotic motion phenomenon were proved,and the impact of the parametric excitation was verified, too. We also researched therelationship between axial movement speed and vibration amplitude, the relationshipbetween axial movement speed and vibration frequency.The original experimental platform was optimized, a tensioning device was added tothe experimental installation. Deviation phenomenon was avoided by the design of theguide rail. Base on the experiment, theory periodic motion, period-doubling motion andchaotic motion phenomenon were proved at the uniform rotation. At the same time, Wealso researched the vibration during the system at startup, operation and stop.