面向圆盘造球机动态特性的研究与优化
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摘要
为提高圆盘造球机的动态性能,提出一种优化思路并对其盘体进行多目标优化设计。利用ANSYS Workbench对造球机的悬臂转子系统进行模态分析与谐响应分析,表明盘体为影响转子系统动态性能的关键结构。以盘体结构为优化目标,利用灵敏度分析确定设计变量,通过Response Surface Optimization得到5组候选设计点,借助基于熵权的模糊物元法得到最优设计方案。对优化前后的转子系统进行比较,其结果表明:悬臂转子系统的动态性能得到有效改善,盘体质量减轻了15.55%,转子系统前六阶固有频率均得到提高,且转子系统在x方向上的最大共振峰值下降了61.7%,y方向下降了49.4%,z方向下降了54.0%,为提高系统动态特性提供了理论依据和参考。
In order to improve the dynamic performance of disc pelletizer,an optimization idea is presented to design the Disc Body of Multi-Objective. Modal analysis and harmonic response analysis by ANSYS Workbench have done and illustrate that the disc is the key part to affect the dynamic performance of the rotor system. Taking the disc body as the optimization object,design variables are determined by sensitivity analysis and 5 groups of candidate design points are obtained by Response Surface Optimization. The design scheme is finally optimized based on entropy weight of fuzzy matter-element method.Optimization of rotor system are compared before and after,results show that:dynamic performance of the cantilever rotor system is improved effectively:first six natural frequencies all been increased under the premier of mass of the disc pelletizer decreased by 15.55%,amplitude of displacement resonance in X direction decreases by 61.7%,amplitude of displacement resonance in Y direction decreases by 49.4%,amplitude of displacement resonance in Z direction decreases by 54.0%,These methods provide reference and theoretical basis for increasing dynamic performance of rotor system.
In order to improve the dynamic performance of disc pelletizer,an optimization idea is presented to design the Disc Body of Multi-Objective. Modal analysis and harmonic response analysis by ANSYS Workbench have done and illustrate that the disc is the key part to affect the dynamic performance of the rotor system. Taking the disc body as the optimization object,design variables are determined by sensitivity analysis and 5 groups of candidate design points are obtained by Response Surface Optimization. The design scheme is finally optimized based on entropy weight of fuzzy matter-element method.Optimization of rotor system are compared before and after,results show that:dynamic performance of the cantilever rotor system is improved effectively:first six natural frequencies all been increased under the premier of mass of the disc pelletizer decreased by 15.55%,amplitude of displacement resonance in X direction decreases by 61.7%,amplitude of displacement resonance in Y direction decreases by 49.4%,amplitude of displacement resonance in Z direction decreases by 54.0%,These methods provide reference and theoretical basis for increasing dynamic performance of rotor system.
引文
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[9]周生良.复合材料储能飞轮结构应力及动态特性研究[D].济南:山东大学,2015.(Zhou Sheng-liang.Research on stress and dynamic characteristic of composite flywheel energy storage system[D].Ji’nan:Shandong University,2015.)
[10]周明刚,张露,陈源.基于灵敏度分析的船式拖拉机机架结构优化设计[J].农业工程学报,2016,32(12):54-60.(Zhou Ming-gang,Zhang Lu,Chen Yuan.Structural optimization for rack of boat-type tractor based on sensitivity analysis[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(12):54-60.)
[2]何敬川.准6000圆盘造球机盘体的有限元分析与优化[D].辽宁:辽宁科技大学,2015.(He Jing-chuan.The finite element analysis and optimization of准6000disc pelletize’s disk[D].Liaoning:University of Science and Technology Liaoning,2015.)
[3]高东强,陈超群,马金锋.立式加工中心床身静动态特性分析及优化[J].机械设计与制造,2013(12):221-223,227.(Gao Dong-qiang,Chen Chao-qun,Ma Jin-feng.The static&dynamic characteristic analysis and optimization of’vertical machining centre bed[J].Machinery Design&Manufacture,2013(12):221-223,227.)
[4]于长亮,张辉,王仁彻.机床整机动刚度薄弱环节辨识与优化方法研究[J].机械工程学报,2013,49(21):11-17.(Yu Chang-liang,Zhang Hui,Wang Ren-che.Study on method for weak link identification of dynamic stiffness of a machine tool and optimization design[J].Journal of Machine Engineering,2013,49(21):11-17.)
[5]KROLL L,BLAU P,WABNER M,et a1.Lightweight components for energy—efficient machine tools[J].CIRP Journal of Manufacturing Science and Technology,2011,4(2):148-160.
[6]唐林新.模糊物元法在发动机选型评价中的应用[J].机电工程术,2012,41(8):201-203.(Tang Lin-xin.The App Hcation of fuzzy matter—element method in the engine type selection evaluation[J].Electrical Engineering Technology,2012,41(8):201-203.2)
[7]陈忠.滚动轴承及其支撑的刚度计算[J].煤矿机械2006(3):387-388(Chen Zhong.Stiffness computation of rolling bearing and its support[J].Coal Mine Machinery,2006(3):387-388.)
[8]李超.陶粒砂混合制粒机悬臂转子动力学分析[D].郑州:郑州大学,2013.(Li Chao.Dynamic analysis for the cantilever rotor of ceramist sand mixer granulator[D].Zhengzhou:Zhengzhou University,2013.)
[9]周生良.复合材料储能飞轮结构应力及动态特性研究[D].济南:山东大学,2015.(Zhou Sheng-liang.Research on stress and dynamic characteristic of composite flywheel energy storage system[D].Ji’nan:Shandong University,2015.)
[10]周明刚,张露,陈源.基于灵敏度分析的船式拖拉机机架结构优化设计[J].农业工程学报,2016,32(12):54-60.(Zhou Ming-gang,Zhang Lu,Chen Yuan.Structural optimization for rack of boat-type tractor based on sensitivity analysis[J].Transactions of the Chinese Society of Agricultural Engineering,2016,32(12):54-60.)