VIBRATION CHARACTERISTICS OF CONTINUOUSLY VARIABLE TRANSMISSION PUSH BELTS

Abstract

A CVT push-belt, composed of 12 layers of bands and a number of segments, ismodeled for vibration analysis. Predefined compression and tension loads are applied to segmentsand bands respectively. Continuous and discrete beams composed of segments are used toinvestigate contact properties between segments. Three models of band contacts have beenestablished based on complexity and various modeling approaches in ABAQUS. Contacts betweenbands are modeled by a frictionless contact between shell elements tied together in the first modeland in the second model. To improve the accuracy, a composite shell with special interface layersis utilized as third model. By using the segment models, it has been concluded that a group ofsegments can be considered as a continuous beam at high compression loads and as individualrigid masses in low compression loads. The results of composite shell model show betterprediction of the vibration properties of bands pack model. Separate cases of loading areconsidered for tension and compression spans.