渐薄工艺对反曲弓能量转化效率的影响

Investigation of Tapered Treatment’s Influence on Energy Exchange Efficiency of Recurve Bows

弓臂是玻璃钢制传统反曲弓的主要蓄能部位,对弓臂进行渐薄处理可以提高弓臂的能量转化效率,而针对弓臂不同部位渐薄对能量转化效率的影响目前未见相关报道.通过有限元理论对不同反曲弓渐薄方案进行理论分析,同时完成了相关的实验测试.理论和实验表明:反曲弓弓臂靠近弓把处会有应力集中现象,通过对靠近弓把处的弓臂进行渐薄处理可以有效地提高能量转化效率;对靠近弓梢处的弓臂进行渐薄处理,会产生多余震动而导致能量转化,效率较低.

Bow's limb is the main power storage part of a traditional FRP recurve bow.The efficiency of such bow will be increased if it is tapered in the limb.However,relative studies on the influence of the tapered treatment on energy exchange efficiency are still limited.In this paper,the researchers did a theoretical analysis by the finite element method and completed the related experiment research.The theoretical and experimental study revealed that stress concentration occurred near the joint of bow's limb and handle;the energy exchange efficiency increased when the part close to the bow's handle was tapered.Because of the redundant vibration,the efficiency decreased if the parts near the bow's tip were tapered.