伸缩杆管体超静定问题的有限元求解

A Finite Element Solution for the Indeterminate Problem of Telescopic Rod/Tube Penetrators

在工程假设基础上,将伸缩杆管体简化为圆柱杆壳结构,运用商业程序对圆柱杆壳第2接触面一次超静定支撑结构进行了有限元求解,给出了应力云图和单元节点路径应力包罗线这两种分析方法。在第2接触面间隙的有限范围内,用ANSYS瞬态动力学模块求解算例,其收敛性可以得到保证。Mises应力节点路径包罗线给出了圆柱壳的危险断面,确定了发生双面支撑对应的第2接触面间隙的范围。经过进一步完善,可以为伸缩杆管体穿甲弹的发射强度提供有限元形式的工程估算方法。

The telescopic rod/tube penetrator was represented as the cylindrical shell-bar based on some engineering suppositions. By using a commercial finite-element code, a statically indeterminate problem that cylindrical shell-bar had two supported surfaces and gap exists in the second contact was solved under transient load. Two methods of stress contour and embracing graph along a predefined path through the nodes of the cylindrical shell enabled us to analyze the results. In the limited bounds of the second contact gap, solution process was astringed by using the transient dynamic module to solve an example of this problem. According to yon Mises stress embracing graphs, minimum life sections of the shell and rational bounds of gap for the penetrators could be quickly obtained. On the foundation of this work we can offer estimating techniques for the strength design of telescopic rod/tube projectile with finite-element analysis.