在拓优化中以配置力驱动的自适应精细化和粗化
Gabriel Stankiewicz1, Chaitanya Dev1, Paul Steinmann1
1Institute of Applied Mechanics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstr. 5, 91058 Erlangen, Bavaria Germany.
概括
本研究介绍了拓优化中的适应性网状精细化的配置力. 这种方法有效地提炼了关键应力和边界区域的网格,降低了复杂设计的计算成本.
科学领域:
- 计算工程
- 材料科学
- 机械工程
背景情况:
- 拓优化是计算密集的,特别是需要许多线性系统解决方案的非线性问题.
- 在拓优化中,精细的网格对于精确的结构定义和应力计算 (例如Mises应力) 是至关重要的.
- 在拓优化中,计算成本随着细网的要求而显著升级.
研究的目的:
- 为拓优化开发一个高效的计算策略.
- 在拓优化中减少与细网要求相关的计算负担.
- 提高压力关键结构的拓优化的精度和效率.
主要方法:
- 一个多层次的适应性网状精细化和粗化策略.
- 这一策略是基于由Eshelby压力产生的配置力.
- 使用配置力来确定需要精细化网格的区域 (应力度和设计边界).
主要成果:
- 配置力量有效地识别了高度紧张的区域和灰色过渡区 (设计边界).
- 使用配置力量的自适应精细化可以在关键区域创建高分辨率网格.
- 多级粗化显著降低了整体计算工作量.
结论:
- 在拓优化中,配置力为网格适应性提供了理想的标准,特别是为了避免应力故障.
- 拟议的战略平衡了对关键领域的高分辨率网格的需求和计算效率.
- 这种方法为计算要求高的拓优化问题提供了有希望的解决方案.
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