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Structural Topology Optimisation with R-Snakes Volume of Solid

机译:实体的R型蛇形结构的结构拓扑优化

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A topologically flexible parameterisation method developed for aerodynamic optimisation is tested on a variety of 2 dimensional structural topology problems. The background to the restricted snakes volume of solid (RSVS) is explained. A topology optimisation framework is develloped using FreeFem++ as a linear clastic solver and differential evolution as the agent based optimiscr. Validation of the analysis is presented as well as mesh convergence and impact studies. The work here is significant such that if a parameterisation method is capable of both aerodynamic and structural optimisation, the potential for multidisciplinary analysis arises. Structural topology optimisation of volume constrained agent-based optimisation, minimising deflection, has been run on four common benchmark cases; two short cantilever beams and two longer centrally loaded (MBB) beams. Results were compared to SIMP calculations made following using Sigmund's 99 line topology optimisation code [1]. RSVS solutions scored objective functions comparable to those found via SIMP in all cases with differences ranging from +40% to -5%. In the long run the combined capability of the RSVS in aerodynamics and structures offers the potential of the development of a general aero-structural topology optimisation framework using a single set of design variables.
机译:针对各种二维结构拓扑问题,测试了为空气动力学优化开发的拓扑灵活的参数化方法。解释了限制蛇的实心体积(RSVS)的背景。使用FreeFem ++作为线性碎屑求解器,以差分演化作为基于代理的优化器,开发了拓扑优化框架。提出了分析验证以及网格收敛和影响研究。此处的工作意义重大,因此,如果参数化方法既可以进行空气动力学优化又可以进行结构优化,则可能会产生多学科分析的潜力。对体积受限的基于代理的优化进行结构拓扑优化,以最小化挠度,已在四种常见的基准情况下进行了优化;两个短悬臂梁和两个更长的中心加载(MBB)梁。将结果与使用Sigmund的99行拓扑优化代码[1]进行的SIMP计算进行了比较。在所有情况下,RSVS解决方案的目标功能得分均与通过SIMP发现的目标功能相当,差异范围为+ 40%至-5%。从长远来看,RSVS在空气动力学和结构方面的综合能力为使用单一设计变量集开发通用航空结构拓扑优化框架提供了潜力。

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