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以管道实测腐蚀缺陷为依据,用ANSYS有限元法计算含长方形、椭圆形和组合形腐蚀缺陷管道的应力、应变状态,根据第三强度失效准则确定腐蚀管道剩余强度,并结合室内管道承压实验进行了结果验证。结果表明:多个腐蚀缺陷间距对于最大等效应力存在临界值,当双点长方形腐蚀缺陷间距小于60 mm时存在干涉,其最大等效应力高于含单个缺陷管道;ANSYS有限元分析软件建模方法可靠,可以模拟含复杂腐蚀缺陷形状管道的受力状态;模拟结果与室内管道承压实验有较好的吻合度,相同条件下最大偏差小于8.6%。ANSYS有限元分析对于含复杂腐蚀缺陷管道模拟具有准确性和可靠性。ANSYS
Based on the measured corrosion defects in pipelines, the stress and strain state of the pipe with rectangular, oval and combined corrosion defects were calculated by ANSYS finite element method. The residual strength of corrosion pipe was determined according to the third strength failure criteria. Combined with the pressure test of indoor pipe The result is verified. The results show that there is a critical value for the maximum equivalent stress for the distance between multiple corrosion defects, and the maximum equivalent stress is higher than that for a single defect pipe when the distance between the two points is less than 60 mm. ANSYS finite element analysis software modeling The method is reliable and can simulate the stress state of pipes with complicated corrosion defects. The simulation results are in good agreement with the pressure experiments of indoor pipes. The maximum deviation under the same conditions is less than 8.6%. ANSYS finite element analysis is accurate and reliable for pipeline simulation with complex corrosion defects. ANSYS