利用民船与装配式公路钢桥结构桥节门桥架设浮桥是战时保障长江南北机动的必然选择。桥节门桥方案是一个综合指标，包含多种技术因素和不确定性，最优方案要从整体上在架设时间、器材数量和作业强度上达到优化。在桥节门桥各方案设计计算结果基础上，提取并建立了由节间长度、门桥长度、桁架数量、作业难易度和最大弯曲应力组成的评价指标体系，通过定性分析和定量分析相结合的方法，建立了桥节门桥优选的模糊物元分析模型。最后通过计算欧氏贴近度确定各方案的排序从而最终得到桥节门桥最优方案。应用结果表明该方法科学合理、简单易行。

It is necessary to ensure the maneuver across the Yangtze River by floating bridge constructed by portable steel bridges and civilian ships. A comprehensive consideration should be invloved in the scheme of the bridge raft, including a variety of technical factors and uncertainties. The optimization of the scheme is related with the factors such as constructing time, equipment and man power. Based on the calculation results of bridge rafts, an evaluating system is built, with consideration of spacing between interior bays, raft length, number of trusses, easiness of operation and the maximal bending stress. A fuzzy matter element model of optimizing the selection of bridge rafts is built by combining quantitative analysis with qualitative analysis. The sequence of schemes and the optimization result are obtained finally based on Euclidean Closeness degree. The application result shows that the method is simple and practical.