耐压壳体局部腐蚀稳定性计算方法

摘要

Equivalent Layered Element method is introduced to take into account the influence of local corrosion of pressure hull.The formula for equivalent elastic modulus of plate with local corrosion is proposed.A series of numerical analysis for the corrosion depth,degree of pitting corrosion intensity,corrosion range and deflection are carried out.Finally,the approximate calculation method via additional deflection is established based on the contrast of stability analysis,and the formula for amplitude of additional deflection is presented.This method is useful for stability analysis of pressure hull with local corrosion.%文章提出了可以计及局部腐蚀损伤影响的等效层合单元方法,建立了局部腐蚀等效弹性模量计算公式,针对耐压壳体局部腐蚀深度、腐蚀强度、腐蚀范围和初挠度进行了系列稳定性数值计算,通过计算结果的对比分析提出了将局部腐蚀等效为附加多波挠度的稳定性近似计算方法,给出了附加挠度幅值的计算公式,可用于耐压壳体局部腐蚀的稳定性分析.