海洋系泊链钢22MnCrNiMo腐蚀磨损试验与数值分析研究

Research on tests and numerical analysis of corrosion and wear damage of mooring chain steel 22MnCrNiMo

建立了锚链在海洋环境中腐蚀磨损(简称"磨蚀")累积损伤数值分析方法,该方法采用非线性有限元分析,能够同时考虑锚链链环间接触面在海水中的腐蚀和磨损耦合损伤。针对22MnCrNiMo低碳低合金钢材料,进行了力学性能、海水侵蚀以及磨蚀性能等多方面的试验研究,确定了基于该材料的锚链链环间接触面在海水中磨蚀损伤数值分析中的相关参数。通过对计算结果与试验结果的比较分析,验证了锚链链环间接触面磨蚀累积损伤数值分析方法的可行性与准确性。

A numerical analysis method is proposed to calculate accumulative damages of corrosion and wear of chain link in service period. Both the corrosion of chain annulus in seawater environment and the wear of contact surface between adjacent links can be considered by using non-linear finite element analysis. For determining mechanical properties of the chain steel used in the finite element analysis,mechanical tests with the low-carbon and low-alloy steel 22MnCrNiMo are carried out to obtain its material hardness, seawater erosion and corrosion wear resistance. Numerical results and experimental data are compared to verify the feasibility and accuracy of the proposed method.