As a non-destructive buckling experimental technique, the vibration correlation technique (VCT) is extensively applied in buckling load prediction of columns, plates and shells under axial compression load. Following the experimental steps of VCT, the VCT can be numerically implemented and used as a numerical prediction method for buckling load. The effectiveness and efficiency of the numerical-based VCT in buckling load prediction of cylindrical shells under combined loading conditions are studied. Firstly, VCT formulas are presented for cylindrical shells under combined loading conditions. Then, a concurrent computing framework is established for the numerical implementation of VCT, which is able to improve the repeated eigenvalue analysis efficiency in VCT. Three illustrative examples are carried out to verify the effectiveness of the concurrent VCT, including the cylindrical shell under external pressure and axial compression, the cylindrical shell under internal pressure and axial compression, and the cylindrical shell under torque and axial compression. Compared with results of buckling tests, explicit dynamic method and Riks method, the proposed concurrent VCT is verified to have high computational efficiency and prediction accuracy. In conclusion, the concurrent VCT is verified to be an efficient and promising numerical method for buckling analysis of cylindrical shells under combined loading conditions.

作为一种无损屈曲实验技术，振动相关技术（VCT）被广泛应用于轴压载荷下柱、板和壳的屈曲载荷预测。遵循 VCT 的实验步骤，VCT 可以在数值上实现并用作屈曲载荷的数值预测方法。研究了基于数值的 VCT 在组合载荷条件下圆柱壳屈曲载荷预测中的有效性和效率。首先，给出了组合载荷条件下圆柱壳的VCT公式。然后，为VCT的数值实现建立了并发计算框架，能够提高VCT中重复特征值分析的效率。为了验证并行VCT的有效性，包括外压和轴向压缩的圆柱壳，内压和轴向压缩的圆柱壳，以及扭矩和轴向压缩的圆柱壳。与屈曲试验、显式动力学方法和Riks方法的结果相比，验证了所提出的并发VCT具有较高的计算效率和预测精度。总之，并发VCT被证明是一种有效且有前途的组合载荷条件下圆柱壳屈曲分析的数值方法。以及受扭矩和轴向压缩的圆柱壳。与屈曲试验、显式动力学方法和Riks方法的结果相比，验证了所提出的并发VCT具有较高的计算效率和预测精度。总之，并发VCT被证明是一种有效且有前途的组合载荷条件下圆柱壳屈曲分析的数值方法。以及受扭矩和轴向压缩的圆柱壳。与屈曲试验、显式动力学方法和Riks方法的结果相比，验证了所提出的并发VCT具有较高的计算效率和预测精度。总之，并发VCT被证明是一种有效且有前途的组合载荷条件下圆柱壳屈曲分析的数值方法。