目的 通过对圆弧叶形弹簧缓冲器非线性大变形特性的研究，为其缓冲设计与应用提供理论参考。方法 基于Euler-Bernoulli梁理论，以叶形弹簧的初始圆弧半径及截面角为基本参数推导弹簧的大变形控制方程，考虑压板作用下弹簧的多种变形情况给出圆弧叶形弹簧变形的边界条件，进而利用两点边值问题的数值解法计算不同顶角的叶形弹簧在外力作用下的变形情况。结果 理论计算结果与数值解高度吻合，表明了计算方法的可靠性，计算得到了不同压力下叶形弹簧变形后的位形图及弹簧的非线性力-变形曲线。结论 所讨论的叶形弹簧具有明显的非线性大变形特性和良好的减震及缓冲吸能特性，能够较好地替代传统缓冲材料用于运输系统的缓冲设计。

The work aims to study the nonlinear large deformation characteristics of the circular arc leaf spring to provide theoretical reference for its buffer design and application. Based on Euler-Bernoulli beam theory, the control equation of large deformation of leaf spring was derived, in which the initial arc radius and section angle were selected as the basic parameters of the control equation. Considering various deformations of the spring under the action of the pressure plate, the boundary conditions of the circular arc leaf spring were given, and then the deformation of the leaf springs with different vertex angles was calculated by the numerical solution. The high agreement between the theoretical results and the numerical solution showed the reliability of the calculation method. The configuration diagram of the leaf spring after deformation under different pressures and the nonlinear force-deformation curve of the spring were obtained by calculation. The leaf spring has obvious nonlinear large deformation characteristics and good damping and energy absorption characteristics, and can be used as a good alternative to traditional buffer materials in the buffer design of transportation systems.