On the basis of V structure, through analyzing the press from the model of mechanics predigested, a relation between strength and transmutation was set up, and the formula of elasticity transmutation of W structure was obtained. 在V形结构的基础上,通过简化力学模型的受力分析,建立力与变形之间的关系,从而获得W形结构的弹性变形公式。