An Analytical Bi-Directional Growth Parameterization to Obtain Optimal Castable Topology Designs
An Analytical Bi-Directional Growth Parameterization to Obtain Optimal Castable Topology Designs
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DOI：
10.2514/6.2004-4596
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发表时间：
2004-08
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影响因子：
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通讯作者：
J. P. Leiva;B. Watson;I. Kosaka
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文献类型：
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作者：
J. P. Leiva;B. Watson;I. Kosaka
†‡提出了一种产生具有最优分型面的最优浇注拓扑设计的新方法。该方法基于设计区域的参数化，适用于基于梯度的拓扑优化方法。该方法考虑了工业应用中常用的不规则网格。它还考虑了可制造性和控制棋盘现象所需的最小构件尺寸。该方法是与学科无关的，并在线性静态和动态问题上进行了测试。该方法减少了设计变量的数量，并且不需要增加额外的约束来反映制造要求，因此是非常有效的。制造要求建立在设计变量的参数化中。这一发展的动机是需要产生结构设计建议，可以在最小程度上改变就可以制造出来。所提出的方法已在Genesis程序中实现，并包括了显示其有效性的实例。
†‡ A new method to produce optimal castable topology designs with optimal parting surfaces is presented. The method is based on parameterizing the design domain and is suitable to be used with gradient-based topology optimization methods. The proposed method takes into consideration irregular meshes commonly used in industrial applications. It also takes into consideration minimum member sizes that are needed for manufacturability and to control the checkerboard phenomena. The method is discipline independent and was tested on linear static and dynamic problems. The method is very efficient as it reduces the number of design variables and does not need to add additional constraints to reflect the manufacturing requirements. The manufacturing requirements are built in a parameterization of the design variables. The development was motivated by the need for generating structural design proposals that could be manufactured with minimum changes. The proposed method was implemented in the GENESIS program and examples that reveal its usefulness are included.