Machine structure simulation using FEA and optimised thermal parameters
Machine structure simulation using FEA and optimised thermal parameters
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发表时间：
2015-03
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通讯作者：
Ayman Abuaniza;S. Fletcher;N. Mian;A. Longstaff
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作者：
Ayman Abuaniza;S. Fletcher;N. Mian;A. Longstaff
在制造过程中连续使用机床会导致运动元件发热，导致机床结构变形。这种热行为的仿真可以成为支持设计过程和预测错误的强大工具。需要确定准确的传热参数来提高物理热模型的预测精度。首先，利用能量平衡技术对参数进行经验计算。由于该技术的边界条件存在不确定性，因此使用了一种基于热成像数据的新型二维优化技术来校准计算参数。使用机器的有限元分析模型证明了该技术的有效性。模拟热特性与实验数据之间实现了高达 80% 的良好相关性。
Continuous usage of machine tools during manufacturing processes causes heat generation in the moving elements, resulting in distortion of the machine tool structure. Simulation of this thermal behaviour can be a powerful tool for supporting the design process and predicting errors. Determining accurate heat transfer parameters is needed to improve the prediction accuracy of the physical thermal models. First, the energy balance technique was used to calculate the parameters empirically. Due to uncertainties in the boundary conditions for this technique, an additional novel 2D optimisation technique based on thermal imaging data was used to calibrate the calculated parameters. The effectiveness of the technique was proved using FEA models of the machine. Good correlation of up to 80 % was achieved between simulated thermal characteristics and the experimental data.