多自由度电液振动台机械结构及液控部分的设计

发布时间：2018-04-05 10:30

本文选题：电液振动台　切入点：动力学仿真　出处：《南京理工大学》2017年硕士论文

【摘要】：振动对机电产品的影响不可忽略,进行振动试验异常重要,但因代价过为昂贵,真实环境下的振动试验并不可行。通过振动台模拟振动环境来对设备的可靠性及动强度进行鉴定,现已作为一种有效的手段。本文采用现代设计方法,研制可用于模拟特种车辆振动的多自由度电液振动台。针对提出的具体振动要求,确定总体设计方案,完成了对振动台液压缸主要外形尺寸及连接装置结构的设计。根据预定设计的机械结构,采用ADAMS软件模拟振动台五种工况下的运动,考虑到车体倾斜振动时受力更大,对15°和4°倾斜两种工况进行了着重分析,找出了竖直缸和水平缸工作时的最大驱动力。在此种情况下,考虑螺栓预紧的影响,通过有限元接触分析,对液压缸及其连接装置进行刚强度的校核。根据分析结果,对所设计的零部件提出适当优化。采用模块化、集成化的设计思路,设计了以动力系统回路和竖直、水平振动系统回路为关键回路的液压系统原理图,在此基础上开发出了集成化程度更高的液压集成块,并对液压泵站进行了合理的布局。本文从振动台的功能需求出发,基于动力学及有限元仿真技术,对振动台的机械结构与液控系统进行了研究。本多自由度电液振动台的研发对于改善振动台产品性能,优化其结构组成具有一定的参考意义。
[Abstract]:The effect of vibration on mechanical and electrical products can not be ignored. It is very important to carry out vibration test, but because the cost is too high, the vibration test in real environment is not feasible.The reliability and dynamic strength of the equipment are evaluated by simulating the vibration environment with the shaking table, which has been used as an effective means.In this paper, a multi-degree-of-freedom electro-hydraulic vibration table can be developed to simulate the vibration of special vehicles by using modern design method.According to the specific vibration requirements, the overall design scheme is determined, and the design of the main shape dimensions of the hydraulic cylinder and the connecting device structure of the shaking table is completed.According to the designed mechanical structure, the motion of vibration table under five working conditions is simulated by ADAMS software. Considering that the force is greater when the car body is inclined to vibration, two kinds of working conditions, 15 掳and 4 掳tilting, are emphatically analyzed.The maximum driving force of vertical cylinder and horizontal cylinder is found.In this case, considering the effect of bolt pre-tightening, the rigid strength of the hydraulic cylinder and its connecting device is checked by finite element contact analysis.According to the analysis results, appropriate optimization of the designed parts is put forward.Based on the modular and integrated design idea, the hydraulic system schematic diagram with the power system loop, vertical circuit and horizontal vibration system loop as the key circuit is designed. On this basis, a more integrated hydraulic integrated block is developed.And the reasonable layout of hydraulic pump station is carried out.Based on the dynamic and finite element simulation technology, the mechanical structure and hydraulic control system of the shaking table are studied in this paper.The research and development of the multi-degree-of-freedom electro-hydraulic vibration table has certain reference significance for improving the product performance and optimizing the structure composition of the vibration table.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB534.2

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