刘成颖,谭 锋,王立平,黄子凌.考虑机床动态性能的床身元结构二次优化方法[J].农业机械学报,2015,46(11):399-404.
Liu Chengying,Tan Feng,Wang Liping,Huang Ziling.Two-level Optimization Method of Bed Unit Structure Considering Dynamic Performance of Machine Tool[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(11):399-404.
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考虑机床动态性能的床身元结构二次优化方法   [下载全文]
Two-level Optimization Method of Bed Unit Structure Considering Dynamic Performance of Machine Tool   [Download Pdf][in English]
投稿时间:2015-02-02  
DOI:10.6041/j.issn.1000-1298.2015.11.054
中文关键词:  机床床身 动态性能 元结构 二次优化
基金项目:“十二五”国家科技支撑计划资助项目(2012BAF01B02)和国家科技重大专项资助项目(2009ZX04002-072)
作者单位
刘成颖 清华大学 
谭 锋 清华大学 
王立平 中国航空动力机械研究所 
黄子凌 清华大学 
中文摘要:通常在机床零件的拓扑结构形式确定以后,单纯的尺寸优化往往难以取得较好的效果。以某卧式加工中心的床身结构为研究对象,提出了一种在元结构优化分析的基础上对结构整体进行二次优化的方法。首先根据床身结构特点提取其元结构进行优化分析,按优化得到的圆形与椭圆形出砂孔尺寸参数对床身结构进行重新设计。然后采用响应面优化方法,将元结构分析的尺寸参数在床身整体结构中进行进一步优化研究。分析表明,在结构质量变化极小的前提下,单纯的元结构优化设计的床身能够改善结构单件及整机的动态性能,但改善幅度较小;而床身整体结构二次优化后其基频提高的幅度约是前者提高幅度的3倍,同时使得整机参考点在X方向的最大响应幅值降低55.2%,Y方向降低83.9%,Z方向降低82.8%。
Liu Chengying  Tan Feng  Wang Liping  Huang Ziling
Tsinghua University,Tsinghua University,China Aviation Power Machinery Research Institute and Tsinghua University
Key Words:Machine tool bed Dynamic performance Unit structure Two level optimization
Abstract:It is often difficult to achieve further optimization results of machine tool parts in terms of sizes parameters after the topology structure of these parts are determined. Taking the machine bed structure of a horizontal machining center as an object, a two level optimization method of the unit structure was proposed, which was based on the analysis and optimization of unit structure, to optimize the whole machine tool bed. Firstly, according to structural features of this machine tool bed, different unit structures were analyzed and compared, and then the round and oval sand hole with original sizes parameters were chosen as the most suitable units to redesign the bed structure. After that, based on response surface method and taking the whole machine tool bed as optimization goal, the second level optimization of unit structure in terms of sizes parameters was achieved. On the premise of minimal change of bed mass, the results of the analysis demonstrate that the two level optimization method achieves better dynamic performance of machine tool compared with single level optimization method which only focuses on the optimization of unit structure. To be more specific, the former method can increase the fundamental frequency of this machine tool bed 3 times than the latter method. Besides, when the former method is applied, the biggest resonance peak of this machine tool is reduced by 55.2% in X direction, 83.9% in Y direction, and 82.8% in Z direction.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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