纵向波纹柱形耐压壳屈曲特性研究

采用数值分析的方法,研究一种纵向波纹柱形耐压壳的屈曲特性。首先,基于圆柱形耐压壳设计了一种纵向波纹柱形耐压壳。在此基础上,建立不同厚度的纵向波纹柱壳和圆柱壳的数值模型,通过数值计算,对比分析两种耐压壳在均布外压作用下的稳定性,探讨厚度对两种壳体在均布外压作用下屈曲特性的影响规律。研究结果表明,在均布外压作用下,纵向波纹柱形耐压壳承载能力明显优于圆柱耐压壳,随着壳体壁厚增大,纵向波纹柱壳屈曲载荷相对圆柱壳的增幅总体呈减弱趋势。

The buckling behaviors of longitudinal corrugated cylindrical shell are studied using numerical methods.Firstly,the longitudinal corrugated cylinder shell are designed based on the cylindrical pressure shell.On this basis,the numerical models of the longitudinal corrugated cylinder shell and cylinder shell with different thicknesses are established.The stability of the two pressure shells under uniform external pressure is analyzed and compared by numerical analysis.The influence of the wall thickness on the buckling of the two shells under uniform external pressure is discussed.The results show that the buckling performance of the longitudinal corrugated cylinder shell is better than that of the cylindrical shell under uniform external pressure.The increase amplification about the buckling load of the longitudinal corrugated cylindrical shell relative to the cylindrical shell generally decreases with the increasing of wall thickness of the shell.