The Characteristic Analysis And Experimental Study Of The Recurve Bow System

At the archery of shooting the bow, the system of the recurve bow and arrow is responded to compel movement, the bow do damp vibration and reach to static state, at the same time the arrow do oblique sports until penetrating on the target with the displacement, velocity and acceleration it gets for the first time while leaving bowstring. The capability of the bow system determines the archery of performance.The paper carrys on academic analysis, static and dynamic characteristic measurement of the bow system, which offer experimental basis for improving the structure of the bow system, and find out the archery how to perform best. Static analysis on the bow system is to find out the limb stress distribution in the condition of the maximal draw length. Modal analysis on the bow system is to get the first steps natural frequency and corresponding mode. The academic analysis conclusions offer references for testing conceptual design in vibration, and prove each other.Vibration measurements adopt two kinds of measurement systems. The piezoelectricity type acceleration measurement system is used for testing the bow system responding and compelled trends, and the strain measurement system can also be used for testing the system static and dynamic distortion, and static and dynamic intensity. The data analysis means adopt single access and double access. The application of single access self-capacity factor spectrum analysis and amplitude value spectrum analysis is to confirm the natural frequency and size the response of the bow system. The application of double access mutual spectrum analysis and mutual coherent analysis is to verify the accuracy of the examined result from different aspects and different excitation modes.The vibration measurements include: The measurement and analysis of the bow system natural frequency and local natural frequency; The dynamic response measurement of the bow system when the fasten screw in different fasten degree; The dynamic measurements of the bow system on different shock absorber's effect; The dynamic measurements of the bow system when different archerys shooting the bow; The coherent analysis of the bow system.The static force measurements of the bow system; The main stain measurements of the limb.Heretofore, the research of the archery of shooting mostly through the way of high-speed photography qualitatively, it has great limitation. Our job is a tentative application of modern test technology in the athletics mechanics.