形状优化和实验性研究粘合层木材梁
Paweł Szeptyński1, Dorota Jasińska1, Leszek Mikulski1
1Division of Structural Mechanics and Material Mechanics, Faculty of Civil Engineering, Cracow University of Technology, ul. Warszawska 24, 31-155 Kraków, Poland.
Materials (Basel, Switzerland)
|January 8, 2025
概括
优化粘合板材木材梁形状将材料使用量减少近13%,同时保持承载能力. 由于材料性质的变化,最大限度地提高产能是具有挑战性的.
科学领域:
- 结构工程是结构工程.
- 材料科学是一种材料科学.
- 在木材建筑中,木材建筑是最重要的.
背景情况:
- 粘合板材 (GLT) 是一个关键的建筑材料.
- 优化梁形状可以提高结构性能和材料效率.
- 了解异构和边界条件对于GLT光束设计至关重要.
研究的目的:
- 为了确定粘合板材木梁的最佳形状.
- 为了最大限度地降低固定承载能力 (LCC) 的材料使用量 (Vmin).
- 为了最大限度地提高固定束体积的承载能力 (Qmax).
主要方法:
- 制定了用于光束形状优化的控制理论问题.
- 使用Pontryagin的最大原则 (PMP) 进行优化.
- 在 Abaqus 中使用了 Dircol v. 2.1 软件和 3D 有限元素分析 (FEA).
- 与参考光束相比,生产并测试了优化光束 (Vmin和Qmax).
主要成果:
- 通过Vmin优化,与可比的LCC相比,成功降低了约12.9%的材料使用量.
- 由于GLT机械性能的高可变性,Qmax优化不那么成功.
- 实验结果通常与Vmin束的理论预测保持一致.
结论:
- 形状优化对于减少GLT梁的材料消耗是有效的.
- 通过形状优化来最大限度地提高承载能力,GLT材料性能变化带来了挑战.
- 对材料特征的进一步研究可以改善Qmax优化策略.
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