1.引言在高超音速下飞行的再入体尾部拖着的一根柔软而不可延伸的导线,在法向及切向空气动力的作用下猛烈地抽打。有时候这根导线在巨大的气动力作用下,要在接近自由端处逐段地断离并飞走。这种现象有些费解,因为在固定端处的拉力通常是最大的,而在自由端拉力 1. INTRODUCTION A soft but inextensible wire towed at the tail of a reentry body flying at high speed of sound violently beats under normal and tangential aerodynamic forces. Sometimes this wire in the huge aerodynamic force, to be close to the free end of the section off and fly away. This phenomenon is somewhat obscure, since the tension at the fixed end is usually the largest and at the free end