为研究材料模型对壁厚线性变化制动锥静态轴压仿真精度的影响，选择较优材料模型用于某型缓冲制动锥的结构设计，利用有限元软件ABAQUS建立模型进行数值仿真。结果表明，仿真分析模型准确可信，Johnson-Cook材料硬化模型比双线性材料强化模型具有更高的仿真精度；圆柱壳长为150 mm、上壁厚为0.5 mm、下壁厚为1.2 mm的缓冲制动锥是所采用结构设计方法下，满足设计指标的最优解。综合来看，所建计算模型和结构设计方法可为缓冲制动锥的设计提供一定的参考。
In order to study the effects of material models on the simulation accuracy of the static axial compression for braking cylindrical shells with linearly variable thickness,and to choose the better one for the structural design of a type of braking cylindrical shell,finite element software ABAQUS was used to build models and simulate. The results indicate that the FEM models are accurate and reliable,the simulation accuracy of Johnson?Cook material hardening model is better than that of bi?linear material intensive model;the optimal solution meeting the design indexes under the method of structural design is that the length of cylindrical shell is 150 mm,the upper wall thickness is 0.5 mm and the lower wall thickness is 1.2 mm. The FEM models and the method of structural design can be referred to designing the braking cylindrical shells.
参考文献
| [1] | 毕世华,王汉平,梁征.导弹垂直弹射过程中制动锥的动力学特性研究[J].北京理工大学学报,2004(09):762-765. |
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