The prediction and test research on fatigue crack growth for the stiffened aluminum alloy panels of“工”section stringer were presented. The stress intensity factor for the stiffened panel was calculated based on the linear elastic fracture mechanics and finite element analysis. The crack growth rate equation used in NASGRO and the load interaction model named the modified generalized Willenborg were used as the basis for the calculation of cycle-by-cycle crack growth life. The predictions and the test results for crack growth of stiffened panels are in good agreement.%进行了铝合金工字型长桁加筋壁板的疲劳裂纹扩展分析与试验研究。利用线弹性断裂力学和有限元法计算工字型长桁加筋壁板的应力强度因子，以NASGRO软件中的裂纹扩展率方程及考虑载荷交互作用的广义Willenborg模型为基础，利用循环接循环进行裂纹扩展计算寿命，并与试验数据相比较。结果表明，预测的寿命与试验结果吻合较好。
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