拓优化牺牲几何体的振动行为,用于精密加工薄壁元件
Evren Yasa1, Ozgur Poyraz1,2, Finlay P C Parson1
1The University of Sheffield Advanced Manufacturing Research Centre North-West, Blackburn BB2 7HP, UK.
Materials (Basel, Switzerland)
|January 10, 2026
概括
为增材制造 (AM) 优化的几何结构提高了模态性能,但在加工薄壁部件时增加了振动灵敏度. 这些发现对于先进的航空航天应用至关重要.
科学领域:
- 材料科学与工程 材料科学与工程
- 机械工程 机械工程
- 制造过程 制造过程 制造过程
背景情况:
- 增材制造 (AM) 在金属零件中提供组件整合和集成功能.
- 在AM中分层制造通常会导致表面粗和几何不准确.
- 机械加工对于改善AM元件的表面表面和尺寸精度至关重要,特别是薄壁结构.
研究的目的:
- 通过激光粉末床融合 (L-PBF) 生产的薄壁Ti6Al4V元件的振动行为.
- 为了评估不同库存封面设计 (常量,逐渐,和两个优化的变体) 在加工过程中对模态特征的影响.
- 评估优化几何形状对模式性能和加工引起的振动的影响.
主要方法:
- 使用L-PBF制造薄壁Ti6Al4V喷气发动机压缩机叶片演示器.
- 评估了四种库存封面设计:恒定型,缩型和两个拓优化的变体.
- 模态分析:在加工前和加工后使用自来水试验来评估振动特征的变化.
主要成果:
- 优化的几何形状可以提高模态性能,而不会增加材料体积.
- 拓优化的设计在加工过程中显示出更大的现场模态变化,而不是恒定或逐渐的设计.
- 在优化的设计中,材料去除和芯片负载的变化增加,增强了振动灵敏度.
结论:
- 优化的库存封面设计可以提高增材制造组件固有的模式性能.
- 优化AM部件的加工,特别是薄壁结构,需要仔细考虑增加的振动灵敏度.
- 需要进一步的研究,以减轻在加工复杂的AM几何形状时的振动挑战,以提高要求高的应用中的性能.
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