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摘要:
为提高航天飞行器铸件舱段在方案论证阶段的结构设计效率、设计质量和迭代效率，基于航天飞行器复杂曲面结构特点对铸件舱段结构特征参数进行研究，提出曲线比率法以描述纵筋参数化布局；定义骨架模型发布元素，以实现铸件舱段的Top-Down设计。提出航天飞行器铸件舱段结构快速参数化设计方法，通过定义特征命名规则和创建特征集合实现建模规范化，通过封装舱段设计知识实现设计快速化，通过创建特征参数和公式实现特征参数化。通过建立交互式铸件舱段结构快速设计环境，实现铸件舱段结构的快速实例化、快速修改，并以航天飞行器铸件舱段为例验证了所提方法的可行性和有效性。
Abstract:In order to improve the structural design efficiency, design quality and iterative efficiency of the spacecraft casting cabin in the scheme demonstration stage, the structural parameters of the casting cabin are studied in combination with structural characteristics of the spacecraft with complex surface, and the curve curvature method is used to express the parametric layout of longitudinal reinforcement. The publication elements of the cabin structural frame model are defined to achieve the Top-Down design of the casting cabin. Simultaneously, a rapid parametric design method for spacecraft casting cabin structure is proposed, normalized modeling is implemented by defining casting feature naming rules and creating feature sets, the rapid design is realized by encapsulating cabin design knowledge, and the feature parameterization is realized by creating feature parameters and formulas. Finally, the rapid design environment for the interactive casting cabin structure is established, rapid structure design and rapid structure modification of casting cabin structure are realized, and the feasibility and effectiveness of the proposed method are verified by the example of spacecraft casting cabin.
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图 5 “封闭曲面—凸台”环筋创建过程
Figure 5. "Closed surface—pad" ring reinforcement creation process
图 6 纵筋定形与定位参数
Figure 6. Shaping and positioning parameters of longitudinal reinforcement
图 7 “封闭曲面—凸台”纵筋创建过程
Figure 7. "Closed surface—pad" longitudinal reinforcement creation process
图 8 基于骨架模型的铸件舱段结构快速创建过程
Figure 8. Rapid creation process of casting cabin based on skeleton model
图 11 航天飞行器铸件舱段结构快速设计环境
Figure 11. Rapid design environment for casting cabin of spacecraft
表 1 铸件舱段参数与公式
Table 1. Parameters and formulas of casting cabin
特征 参数 公式 蒙皮 无 不创建 端框 FW1、FW2、FT2 创建 环筋 RW1、RW2、RW3、RT1、RT2 创建 纵筋 VW1、VW2 创建 
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表 2 纵筋参数对比
Table 2. Comparison of longitudinal reinforcement parameters
纵筋 原始值/更改值 RV VW1/mm VW2/mm 纵筋_比率_0.12 原始值 0.12 20 4 更改值 0.14 25 4.5 纵筋_比率_0.46 原始值 0.46 20 4 更改值 0.44 25 4.5
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