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以物元、可拓集合和关联函数等可拓学理论为基础,建立了燃气管道土壤腐蚀性综合评价的物元可拓模型,介绍了确定评价物元、经典域和节域、待评物元、关联函数、权重、待评物元综合关联度和评价级别的方法和步骤。以常州港华燃气某段长为23km的高压燃气管段为研究对象,选择含盐量、含水量、自然腐蚀电位、氧化还原电位和电阻率作为评价指标,利用该模型对对象管段沿线土壤进行综合评价,从综合关联度和变量特征值两个角度确定土壤的腐蚀性等级为IV级,说明该段土壤腐蚀程度较高,若在此处设置燃气管道,必须采取严格的防腐措施并定期实施无损检测。研究结果表明:物元可拓模型基本适用于燃气管道土壤腐蚀性的综合评价,但在合理制定评价标准,选取评价指标、关联函数及计算权重等方面,尚需深入探讨。
Based on extenics theory, such as matter element, extension set and correlation function, the matter-element extension model of comprehensive evaluation of gas pipeline soil corrosivity is established. The method of determining object element, classical domain and section domain, Yuan, correlation function, weight, to be appraised as the comprehensive relevance of evaluation and evaluation methods and steps. Taking Changzhou Ganghua high-pressure gas pipe section with a length of 23km as the research object, salt content, water content, natural corrosion potential, redox potential and resistivity were selected as evaluation indexes, and the model was used to synthesize the soil along the target pipe section Evaluation, from the comprehensive relevance and variable eigenvalues to determine the soil corrosion level IV, indicating that this section of the soil a higher degree of corrosion, if the gas pipelines set here, we must take strict anti-corrosion measures and regular implementation of non-destructive Detection. The results show that the matter-element extension model is suitable for the comprehensive evaluation of gas pipeline soil corrosivity. However, it is necessary to further explore the reasonable evaluation criteria, selection of evaluation indexes, correlation function and calculation weight.