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对基于支架架构的架构格子结构的高和低保真模态和机械分析,具有辅助学拓
Kishor B Shingare1,2, Shital Bochare1,2,3,4, Andreas Schiffer3
1Department of Aerospace Engineering, Khalifa University of Science & Technology, Abu Dhabi, United Arab Emirates.
Scientific reports
|February 3, 2026
概括
这项研究以数值方式研究了基于支架的格子结构,重点是辅助式设计. 均质化模型对于正规格子是可靠的,但对于复杂的辅性格子可靠性较低,准确度为3x3x3的值.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 计算力学 计算力学 计算力学
背景情况:
- 建筑格子结构提供可调节的机械性能.
- 辅性材料表现出独特的变形行为,包括负波桑比率.
- 精确预测动态和机械性能对于高级应用至关重要.
研究的目的:
- 以数值研究基于支架的格子结构的动态和机械性能.
- 评估各种格子拓的高保真与低保真 (同质化) 模型的准确性.
- 为高性能应用提供设计指导,以优化格子结构,特别是辅助性格子结构.
主要方法:
- 使用高保真性和同质化的模型进行有限元模拟.
- 分析各种格子几何形状 (八度,钻石,立方,双金字塔) 和单元细胞大小.
- 使用周期性边界条件进行模态分析和有效机械性能计算.
主要成果:
- 同质化的模型准确地预测了正规的同otropic 格子的自然频率,但在较小的尺度上对复杂的/auxetic 格子的预测过度.
- 一个3x3x3单元细胞值被确定为可靠的同质化在异型格子.
- 辅助性行为 (负波桑比率) 已确认;圆形片提高了刚度和模态精度;在对称几何体中观察到模态退化.
结论:
- 模拟保真度的选择 (高与低) 是关键的,并且取决于格子几何和规模.
- 设计准则是为选择适当的保真度和实施共振回避策略而建立的.
- 这项研究使得基于格子的材料的优化设计能够用于航空航天,生物医学和复合材料系统.
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