Digital Wheel Design And Twin Experiment Analysis

The digital wheel is an analysis model.In this paper,the digital wheel is designed for the spoke wheel,including the derivation of the mechanical calculation method and the establishment of the model.The wheel is an essential component of almost all vehicles.With the development of aerospace,military defense,intelligent and unmanned technology,the wheel spokes of high-end equipment such as lunar rover,weapon delivery,robot and Automated Guided Vehicle(AGV)driving in harsh environments such as high temperature,high pressure,microgravity and strong radiation not only determine the structure,load and maintenance of the wheel,but also affect the reliability,rolling resistance,energy saving and environmental protection,modular design and production process cost and materials of the wheel,but after literature research found.At present,the research on wheels structured and its stress analysis at home and abroad still depends on the test of technical indicators and the test verification of performance parameters.This paper proposes a set of analysis models and calculation methods for the spoke wheel which is widely used but lacks relevant research.The main contents of this paper are as follows :(1)Theoretical basis and modeling.The structure and basic parameters of the spoke wheel are described in detail,and the analysis and design methods of the radial and cross spoke structures are proposed.(2)Derivation and establishment of digital wheel model.The spoke tension generated by the wheel under the stress state of axle load,axle driving and braking torque,axle traction and braking,wheel-ground reaction,and tangential friction of the rim is analyzed and calculated in detail.The relationship between the spoke tension and the number,length and weaving method of the spoke is revealed.The composition structure of the spoke wheeled and the force distribution of the spoke structure of radial load is studied.The corresponding wheel force vectored analysis model is established.On this basis,the digital wheel model is established,including the theoretical model of mathematical derivation and the CAD model library.(3)Stress distribution tests / tested system of speaking structure of radial load.In this paper,the tension distribution of the hub load in the digital spoke wheel model is taken as the verification target.Combined with the basic parameters,structure and bearing mode of the spoke wheel,the force distribution measurement test system is designed and built independently,including the radial loading test platform and the test sensor wheel.It is a necessary condition to verify the correctness of the theoretical model of the digital wheel to provide the hardware basis of the subsequent test analysis.(4)Theoretical calculation and experimental verification and application of digital wheel theory.The test sensor wheel is used as the twin of the theoretical model,and the test is carried out on the test platform.The simulation data obtained by static simulation,the theoretical data obtained by theoretical calculation and the measured data obtained by experiment are analyzed and compared by simulation software.The correctness of the conclusion of tensile stress distribution of wheel spoke structure of radial load in digital wheel model is verified,and the importance and key role of spoke balance tension are quantitatively explained.The method of applying the stress variation law of the spoke structure of the intelligent wheel is preliminarily discussed,and a piezoelectric module for the spoke wheel is designed.(5)Summary Finally,the paper summarizes the work and prospects the research direction after the digital wheel.After derivation and verification,under the action of axial load,the tension of the spoke changes periodically with the change of the angular displacement of the spoke(0°～360°).Aiming at the spoke wheel under radial load,the spoke tension stressed analysis and calculation method with a relative error of less than10% and a more accurate model are proposed.It is hoped that the established digital wheel model can provide analytical models and calculation methods for the spoke design of non-pneumatic wheels,elastic wheels,honeycomb or hollow wheels,and also provide reference and basis for the manufacture,measurement and maintenance of wheel set spoke wheels.