由于扁挤压筒的形状特点 ,厚壁圆筒的接触应力计算公式不再适用 ,通常采用有限元方法进行分析计算。提出一种求解接触应力的有效方法 ,应用接触体的受力条件和几何条件对弹性刚度矩阵进行矩阵合成与变换 ,可一次性求解边界接触力和节点位移 ,从而获得接触体在装配压力作用下的应力场分布 ,此方法简称矩阵合成变换法。 Due to the shape of the flat extrusion cylinder, the calculation formula of the contact stress of the thick cylinder is no longer applicable, and the finite element method is usually used for analysis and calculation. An effective method to solve the contact stress is put forward. The matrix of the elastic stiffness matrix is ​​synthesized and transformed by using the force and geometry conditions of the contact body. The boundary contact force and the node displacement can be solved once, and the contact body can be obtained under the assembly pressure The stress field distribution, this method referred to as matrix synthesis transformation method.