银枪刺喉表演的力学原理浅析

BRIEF ANALYSIS OF THE MECHANICS PRINCIPLE OF PERFORMANCE OF STABBING THROAT WITH SILVER SPEAR

基于银枪受力状态,分别构建了细长压杆和简支梁模型,给出了枪杆弯曲变形与表演者喉部受力的关系,建议了几种表演技巧。主要结论包括:(1)压杆失稳型表演,即使枪杆产生了大变形,表演者喉部受力亦不大。增大杆长,减小杆细,采用更为柔软的藤棍和更钝的枪头,以及使枪杆尽快弯曲,均可减小表演者喉部受力。(2)简支梁型表演并非"真正的银枪刺喉",枪杆弯曲变形取决于辅助人员用力,表演者喉咙所受的刺向力并不大。

According to the force state of the silver spear,the mechanical models of the slender compression rod and the simple-supported beam are established,respectively,the relationship between the force on the throat of the performer and the bending deformation of the spear is obtained,and some performance skills are suggested.The main conclusions include:(1)For stabbing throat with a silver spear as a compression rod,even if the spear has a large deformation,the force on the performer’s throat is not very large.Measures for reducing the force on the performer’s throat include:increasing the rod length,reducing the rod thickness,using a softer rattan stick and a blunt tip,and bending the spear as quickly as possible.(2)The performance as a simple-supported beam is not a"real stabbing throat act with silver spear".The bending and deformation of the spear depends on the force of the auxiliary performer.The piercing force on the performer’s throat is not very large.