This article falls within the scope of topology optimization for Additive Manufacturing processes and proposes an alternative strategy to prevent the phenomenon known as the Dripping Effect. The Dripping Effect is when an overhang constraint is imposed on topology optimization processes for Additive Manufacturing and is defined as the formation of oscillatory contour trends within the prescribed threshold angle. Although these drop-like formations constitute local minimizers of the constraint function, they do not provide a printable feature, and, therefore, they neither eliminate the need to form temporary support structures. So far, there has been no general agreement on how to prevent the Dripping Effect, so this work aims to introduce a strategy that effectively prevents it, and that at the same time may be easy to extrapolate to other types of geometric overhang restrictions. This paper provides a study of the origin of the Dripping Effect and gives detailed instructions on how the proposed prevention strategy is applied. In addition, several benchmark examples where the Dripping Effect is prevented are shown.

本文属于增材制造工艺的拓扑优化范围，并提出了一种替代策略来防止称为滴落效应的现象。滴落效应是当对增材制造的拓扑优化过程施加悬垂约束时，它被定义为在规定的阈值角度内形成振荡轮廓趋势。尽管这些滴状结构构成了约束函数的局部最小化器，但它们不提供可打印的特征，因此，它们也不需要形成临时支撑结构。到目前为止，关于如何防止滴落效应尚未达成普遍共识，因此这项工作旨在引入一种有效防止它的策略，并且同时可能很容易外推到其他类型的几何悬垂限制。本文对滴落效应的起源进行了研究，并详细说明了如何应用所提出的预防策略。此外，还显示了几个防止滴落效应的基准示例。