闭锁间隙对回转闭锁接触应力影响数值仿真分析

Numerical Simulation of the Contact Stress Influenced by Locking Space of the Rotating Locking Mechanism

建立了自动机机头和节套在闭锁阶段的有限元模型,并在模型中引入了实际可能存在的接触和闭锁间隙,通过非线性瞬态有限元软件进行数值计算,获取了机头和节套闭锁面在不同闭锁间隙碰撞下的Von-Mises等效应力云图,分析了闭锁间隙对闭锁面接触应力的影响,并引入接触面压强波动系数和波幅反映了接触应力值波动随闭锁间隙变化的规律,仿真结果可为闭锁机构的强度设计和工作特性分析提供一定依据。

Established the finite element model of a firearm bolt and barrel extension in the stage of closed bolt, introduced in the model the actual contact and gap may exist locking mechanism, by employed a nonlinear dynamical finite element software for numerical calculation, obtained the Von-Mises equivalent stress contours of a firearm bolt and barrel extension＇s contact surface at different locking space collision, analyzed the contact stress of the locking surface affected by locking space, and the introduction of the contact surface pressure fluctuation coefficient and fluctuation amplify reflects the regulation of the contact stress value variation with the gap of locking mechanism, simulation results for the locking mechanism provide a basis for strength design and characteristic analysis.