基于领域分解的新型模型,用于大型复合机床的高效动态预测

IF 4.4 2区 工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY
YangBo Yu, YuLei Ji, YanRen Chen, Kun Xu, QingZhen Bi
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引用次数: 0

摘要

我们提出了一种由碳纤维增强聚合物(CFRP)层压板组成的大型组合运动部件,用于制造具有高动态性能的轻型机床。复合材料机床的精确动态预测对新一代机床至关重要。本文旨在解决复合材料机床数值动态建模和设计中的两个难题,以提高开发效率。(1) 组成复合机床的各向异性复合层压板在不同方向上存在耦合。我们提出了广义边界连续性条件来解决这一动态建模难题。(2) 复合机床具有许多复合金属耦合结构。我们对各向同性金属进行力学模型修正,以解决其动力学问题。我们以带有复合运动部件的五轴龙门机床为例,建立了一个有效预测的动态模型,并通过仿真和实验进行了验证。与有限元分析相比,该方法的模态频率预测平均相对误差仅为 3.85%,求解时间缩短了 99.7%,取得了令人瞩目的成果。我们进一步讨论了复合机床在不同堆叠角度和层数下的动态性能。我们提出了复合机床的一般设计标准,以考虑机床的模态频率和制造成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A novel domain decomposition-based model for efficient dynamic predictions of large composite machine tools

We propose a large combined moving component composed of carbon fiber reinforced polymer (CFRP) laminates for making lightweight machine tools with high dynamic performance. The accurate dynamic prediction of composite machine tools is essential for the new generation machine tool. This paper aims to address two challenges in numerical dynamic modeling and the design of composite machine tools to enhance development efficiency. (1) Anisotropic composite laminates, which form the composite machine tool, exhibit coupling in various directions. We propose the generalized continuity condition of the boundary to tackle this dynamic modeling challenge. (2) Composite machine tools feature numerous composite-metal coupled structures. The mechanical model correction of isotropic metals is performed to address their dynamics. We take the example of a five-axis gantry machine tool with composite moving parts, establish a dynamic model for efficient prediction, and verify it through simulation and experimentation. The proposed method yields remarkable results, with an average relative error of only 3.85% in modal frequency prediction and a staggering 99.7% reduction in solution time compared to finite element analysis. We further discuss the dynamic performance of the machine tool under varied stacking angles and layer numbers of the composite machine tool. We propose general design criteria for composite machine tools to consider the modal frequency and manufacturing cost of machine tools.

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来源期刊
Science China Technological Sciences
Science China Technological Sciences ENGINEERING, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
8.40
自引率
10.90%
发文量
4380
审稿时长
3.3 months
期刊介绍: Science China Technological Sciences, an academic journal cosponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China, and published by Science China Press, is committed to publishing high-quality, original results in both basic and applied research. Science China Technological Sciences is published in both print and electronic forms. It is indexed by Science Citation Index. Categories of articles: Reviews summarize representative results and achievements in a particular topic or an area, comment on the current state of research, and advise on the research directions. The author’s own opinion and related discussion is requested. Research papers report on important original results in all areas of technological sciences. Brief reports present short reports in a timely manner of the latest important results.
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