有限元在身管与药筒高压接触变形计算中的应用

本文针对自动武器中药筒和身管变形的变间隙、变锥度的特点，构造了身管和药筒的截面环等参元分析模型，并据此建立了相应的增量形式的弹塑性有限元求解方程．针对贴膛不同时刻的特点，在身管和药筒上配置了配点对，应用变形协调条件，编制了药筒和身管高压间隙变形的有限元求解程序．并给出了数值计算实例．

FINITE-ELEMENTCOMPUTATIONAL METHOD FORHIGH PRESSURE DEFORMATIONBETWEEN BARREL ANDCARTRIDGE

in this paper a sectional ring parametricelement model of barrel and cartridge is constructedin accordance with the characteristics of varyingclearance and taper between the cartridge and barrel of the automatic weapon, and an incrementalelasto-plastic finite element equation is established.In light of the characteristics at different momentsnestling up against the chamber, matching-pointsare allotted between the barrel and the cartridge.With aid of deformation coordinate conditions, thefinite element programmes of interval deformationof the barrel and the cartridge under high pressurehave been developed. Finally a numerical exampleis given.