基于CSR有限元分析球扁钢等效方法研究

基于CSR的油船有限元分析中，球扁钢不可以直接进行疲劳及屈曲计算，需将其等效为L型材或T型材。规范要求保证等效前后横剖面面积及惯性矩特性与原球扁钢相同。而且在利用PULS进行加筋板屈曲计算时对其加强筋（如扁钢、L型材及T型材）有尺寸比例限制。依据上述要求建立了球扁钢等效优化模型，并采用相应优化算法进行求解。实例计算结果表明，所用方法基本保证了等效结果满足规范要求，并可以进行屈曲计算，达到工程应用要求。

Equivalent method for bulb flats based on CSR finite element analysis

According to CSR finite element analysis,bulb flats cannot be applied for fatigue and buckling calculation directly,and should be equilized as L-Profile or T-Profile.The Rules requires that same sectional area and moment of inertia should be kept equivalent.In addition,when using PULS to calculate stiffened plate buckling,the dimension and scale of stiffeners(as flat steel,L-profile or T-profile) is limited.In this paper,the equivalent optimization models are established,and the corresponding solutions are ...