To address the limitations of flanges with bolted joints systems in the preliminary selection, layout optimization, response analysis, and safety assessment, a forward design method oriented to high performance and complex service conditions is proposed. Design criteria and an optimization method for the layout of bolted joints are established. Based on the load extraction technique, a high-accuracy mechanical model for the load-bearing behavior of a single bolted joint is developed. An improved safety standard for the stress and strength verification of a high-strength bolted joint is proposed and a complete and efficient forward design system is established. The proposed method is validated through numerical examples. The results demonstrate that the developed forward design framework can effectively avoid over-design and under-design, enabling a full-process forward design of flange bolted joint systems from preliminary configuration design and local load-bearing verification to overall reliability assessment.

针对现有法兰紧固连接系统在初步选型、排布优化、连接响应分析和安全性评估方面存在的不足, 提出一种面向高性能和复杂工况的正向设计方法, 并建立螺栓初始排布设计准则及其优化方法。基于螺栓节点载荷提取技术, 构建高精度的单螺栓装配承载力学模型。提出改进的高强度单螺栓的应力与强度校核安全标准, 形成一套完整、高效的正向设计体系。通过算例分析对该方法进行验证, 结果表明, 所构建的正向设计规范能够有效地避免过设计和欠设计问题, 实现法兰紧固连接系统从构型初步设计、局部承载校核到整体可靠性评估的全过程正向设计。