基于虚拟样机技术的多自由度隔振系统动态响应特性研究
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摘要
滚筒洗衣机属于典型的多自由度隔振系统,为提升其减振效果,运用虚拟样机技术方法实现隔振系统的动力学特性分析以及振幅、弹簧力、阻尼力等参数的优化。基于ANSYS和ADAMS建立振动系统的仿真模型,通过动力学分析平台ADAMS/Vibration求解不同激振频率下的幅值响应。LMS振动测试表明,耦合模型具有良好的可行性和较高的计算精度。基于灵敏度法分析弹簧刚度和阻尼系数对目标函数的响应效果,设计优化变量的样本数值,通过极值搜索得出满足最优减振条件的pareto最优解集,实现隔振系统关键参数的最优化设计。
Drum washing machine belongs to a typical multi-degree-freedom vibration isolation system. In order to improve the vibration reduction effect,the virtual prototype technology method is used to realize the dynamic characteristic analysis and the optimization of amplitude,spring force and damping force. Based on ANSYS and ADAMS,a simulation model of the vibration system was established,and the amplitude response of different vibration frequency was solved by the dynamic analysis platform ADAMS/Vibration. The vibration test of LMS shows that the coupling model has good feasibility and high calculation precision. The response effect of the spring stiffness and damping coefficient on the target function was analyzed based on the sensitivity method. The sample values of variables were designed and optimized. The Pareto optimal solution set that satisfies the optimal damping condition was obtained through extreme value search,realizing and the optimal design of key parameters.
Drum washing machine belongs to a typical multi-degree-freedom vibration isolation system. In order to improve the vibration reduction effect,the virtual prototype technology method is used to realize the dynamic characteristic analysis and the optimization of amplitude,spring force and damping force. Based on ANSYS and ADAMS,a simulation model of the vibration system was established,and the amplitude response of different vibration frequency was solved by the dynamic analysis platform ADAMS/Vibration. The vibration test of LMS shows that the coupling model has good feasibility and high calculation precision. The response effect of the spring stiffness and damping coefficient on the target function was analyzed based on the sensitivity method. The sample values of variables were designed and optimized. The Pareto optimal solution set that satisfies the optimal damping condition was obtained through extreme value search,realizing and the optimal design of key parameters.
引文
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[2]曹宏瑞,李亚敏,何正嘉,等.高速滚动轴承-转子系统时变轴承刚度及振动响应分析[J].机械工程学报,2014,50(15):73-81.
[3]马龙祥,刘维宁,李克飞.移动荷载作用下浮置板轨道振动响应的频域快速数值算法[J].铁道学报,2014,36(2):86-94.
[4]贾凯凯,梅江平,刘松涛,等. 4自由度并联机构刚体动力学模型[J].机械工程学报,2016,52(13):10-16.
[5]赵振峰,郭顺宏,张付军,等.对置活塞折叠曲柄内燃机刚体动力学特性分析[J].内燃机工程,2015,36(6):91-97.
[6]李欣冉,陈无畏,陈晓新.基于刚柔耦合模型的悬架NVH性能研究[J].中国机械工程,2014,25(7):978-983.
[7]杨冬,周勤勇,刘玉田.基于灵敏度分析的限流方案优化决策方法[J].电力自动化设备,2015,35(5):111-118.
[8]刘宇飞,辛克贵,樊健生,等.环境激励下结构模态参数识别方法综述[J].工程力学,2014,31(4):46-53.
[9]李发宗,童水光,王相兵.基于模态分析的液压挖掘机工作装置动态优化设计[J].农业机械学报,2014,45(4):28-36.
[10]成伟华.多刚体动力学仿真技术在汽车设计中的应用[J].时代农机,2016,43(4):45-46,52.
[11]唐治,陈慧岩.自动变速器液压系统动态响应特性试验研究[J].液压与气动,2015(8):44-46,72.
[12]梁西昌,万熠,朱振杰,等.频谱分析法在振动时效系统中的实验研究[J].实验技术与管理,2015,32(2):65-68.
[13]CARNAHAN J J,RICHARDS C M. A modification to filtered-X LMS control for airfoil vibration and flutter suppression[J]. Journal of vibration and control,2008,14(6):831-848.
[14]邢宇飞,王成恩,柳强.基于Pareto解集蚁群算法的拆卸序列规划[J].机械工程学报,2012,48(9):186-192.
[15]DELL'OLMO P,GENTILI M,SCOZZARI A. On finding dissimilar Pareto-optimal paths[J]. European journal of operational research,2015,162(1):70-82.