【摘要】 针对加筋板组合结构提出了一种有效的中频声振疲劳分析方法。该方法采用Hybrid FESEA方法计算加筋板中频声振响应，得到筋与板各1/3倍频程的应力均方根值，基于Dirlik零阶矩应力谱法预测筋板各子结构的疲劳寿命。典型加筋板的有限元精细建模分析验证了所提分析方法的正确性，同时也估算了其在宽频声激励下的疲劳寿命。计算结果显示，中频激励下的疲劳损伤量对整个宽频疲劳损伤量的贡献不能忽略，采用低频有限元（Finite Element Method, FEM）和中频Hybrid FE-SEA的混合分析方法可以高效求解加筋板宽频声振疲劳问题。更多还原

【Abstract】 A mid-frequency vibro-acoustic fatigue analysis method for stiffened panels is proposed, in which the stiffener displacements and the panel energies are calculated by using the Hybrid FE-SEA method.The stress RMSs of stiffener and the panels in each 1/3 octave band are calculated and the Dirlik zero-moment stress spectrum method is introduced for the fatigue analysis of stiffened panels. The correctness of the proposed method is verified by the FE analysis of stiffened panels, and also the fatigue life of stiffened panels under broadband acoustic excitation is estimated. Numerical results show that, the outcomes of mid-frequency band make an important contribution to the fatigue damage over the wide frequency band and cannot be ignored. The proposed combined algorithm, in which the stress RMSs are calculated by Finite Element Method(FEM) in low frequency and Hybrid FE-SEA method in mid-frequency, is effective in the fatigue analysis under the wide frequency band acoustic excitation.更多还原