发射载荷作用下火炮座圈动态响应研究

Dynamic response of gun seat ring under launching load

为了研究火炮射击时座圈的动态响应,充分考虑了构件之间特别是滚子与座圈内外滚道的接触碰撞关系,建立了某火炮上装部分的非线性有限元动力学模型。基于传统理论对座圈进行了静力分析。将有限元静力分析结果与赫兹理论计算结果进行对比,验证了有限元模型的合理性。采用动态隐式积分算法对发射载荷作用下座圈的动态接触问题进行分析,获得了座圈的接触力和接触应力的变化规律,并将结果与传统理论的静力分析结果进行了比较。结果表明有限元动力分析获得的座圈最大接触力和接触应力比传统理论的计算结果分别大约30%和45%,传统理论在座圈受力分析中具有一定的局限性,有限元动力分析结果更符合实际情况。

Considering the contact impact between interacting components especially cylindrical rollers and raceway inside and outside the seat ring,a nonlinear finite element dynamic model of a large caliber gun is established to study the dynamic response of the gun seat ring during gun firing. Static analysis of the seat ring is made based on traditional theory. The static analysis results of the finite element method are compared with those of Hertz theory,and the correctness of the finite element method is verified. The dynamic contact problem of the seat ring under launching load is analyzed using dynamic implicit integration algorithm,and the variation rules of contact force and contact pressure of the seat ring are obtained. The dynamic analysis results of the finite element method are compared with the static analysis results of traditional theory. The results show that the maximum contactforce and the peak contact stress obtained by the finite element method are greater than traditional theory calculation results by 30% and 45% respectively,traditional theory has certain limitations in force analysis of gun seat rings,and the analysis results of the finite element method are more suitable for actual formations.