冲击载荷下30SiMnCrMoVE圆柱壳动态响应特性研究
Research on Dynamic Response Characteristics of 30SiMnCrMoVE Cylindrical Shells under Impact Loading
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摘要: 为了获得冲压增程火箭发动机壳体材料30SiMnCrMoVE材料在承受动态载荷过程中的响应关系,以30SiMnCrMoVE材料为研究对象,通过实验与仿真相结合的方法,研究了不同冲击能量对不同径厚比圆柱壳体的作用,获得了对圆柱壳体的破坏模式转化的影响规律。结果表明:相同冲击能量条件下,圆柱壳径厚比增加,轴向缩短变形量也随着增加。壁厚相同,冲击能量越大,圆柱壳轴向变形量越大。采用LS-DYNA软件对30SiMnCrMoVE圆柱壳撞击过程进行仿真,得到了极限载荷与时间的关系。极限载荷模拟结果的变化趋势与试验结果一致。Abstract: In order to obtain the response relationship of 30SiMnCrMoVE material for stamping extended range rocket engine shell during dynamic loading process, taking 30SiMnCrMoVE material as the research object, the effect of different impact energy on the cylindrical shells with different diameter to thickness ratios was studied, and the influence law of failure mode transformation of cylindrical shells was obtained. The results show that under the same impact energy condition, as the diameter to thickness ratio of the cylindrical shell increases, the axial shortening deformation also increases. Under the same wall thickness, the greater the impact energy, the greater the axial deformation of the cylindrical shell. LS-DYNA software was used to simulate the impact process of 30SiMnCrMoVE cylindrical shells, and the relationship between ultimate load and time was obtained. The variation trend of the simulated ultimate load is consistent with the experimental results.
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