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Ground structure method-based stiffener layout topology optimization for horizontal machining center headstock cover plate
Computers & Structures ( IF 4.4 ) Pub Date : 2024-12-23 , DOI: 10.1016/j.compstruc.2024.107633
Hongyu Liu, Zheng Qiu, Jun Shi, Jianhong Sun, Song Zhang
Computers & Structures ( IF 4.4 ) Pub Date : 2024-12-23 , DOI: 10.1016/j.compstruc.2024.107633
Hongyu Liu, Zheng Qiu, Jun Shi, Jianhong Sun, Song Zhang
Structural dynamic performance of a machine tool greatly affects machining precision and productivity. One effective approach in improving the dynamic performance is by applying topology design optimization to the machine tool structure. A method based on the Ground Structure Method (GSM) is established to optimize the layout of stiffener structure. The GSM is employed for the construction of the stiffener. The optimal layout of the stiffeners is obtained by optimizing the thickness of each stiffener and penalizing intermediate thicknesses to ensure a clear layout. A topology optimization method based on maximizing the natural frequency is established to achieve maximum natural frequency design of stiffener plate. Finally, a few examples are presented to demonstrate the efficacy of the proposed method in enhancing the basic frequency of the structure. The method has been effectively utilized in the optimal design of the machine tool headstock cover plate. As a result, the lowest six natural frequencies of the headstock are increased by 17.83 %, 17.88 %, 5.99 %, 5.58 %, 19.52 % and 14,53 %, respectively. The new approach outlined in this paper serves as a valuable reference for optimizing the dynamic characteristics of machine tools.
中文翻译:
基于地面结构方法的卧式加工中心主轴箱盖板加劲肋布局拓扑优化
机床的结构动态性能对加工精度和生产率有很大影响。提高动态性能的一种有效方法是将拓扑设计优化应用于机床结构。建立了一种基于地基结构法(GSM)的加劲肋结构布局优化方法。GSM 用于建造加强筋。通过优化每个加劲肋的厚度并惩罚中间厚度以确保清晰的布局,可以获得加劲肋的最佳布局。建立了一种基于固有频率最大化的拓扑优化方法,以实现加筋板的最大固有频率设计。最后,通过几个例子来证明所提出的方法在提高结构的基本频率方面的有效性。该方法已有效地用于机床主轴箱盖板的优化设计。结果,主轴箱的最低六个固有频率分别增加了 17.83 %、17.88 %、5.99 %、5.58 %、19.52 % 和 14.53 %。本文概述的新方法为优化机床的动态特性提供了有价值的参考。
更新日期:2024-12-23
中文翻译:
基于地面结构方法的卧式加工中心主轴箱盖板加劲肋布局拓扑优化
机床的结构动态性能对加工精度和生产率有很大影响。提高动态性能的一种有效方法是将拓扑设计优化应用于机床结构。建立了一种基于地基结构法(GSM)的加劲肋结构布局优化方法。GSM 用于建造加强筋。通过优化每个加劲肋的厚度并惩罚中间厚度以确保清晰的布局,可以获得加劲肋的最佳布局。建立了一种基于固有频率最大化的拓扑优化方法,以实现加筋板的最大固有频率设计。最后,通过几个例子来证明所提出的方法在提高结构的基本频率方面的有效性。该方法已有效地用于机床主轴箱盖板的优化设计。结果,主轴箱的最低六个固有频率分别增加了 17.83 %、17.88 %、5.99 %、5.58 %、19.52 % 和 14.53 %。本文概述的新方法为优化机床的动态特性提供了有价值的参考。