基础振动对非对称液压缸的动态特性影响分析  

Dynamic Characteristics Analysis of Asymmetric Hydraulic Cylinder under Foundation Vibration Condition

作　　者：张怀亮[1,2] 邹伟[2] 袁坚[2] 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,长沙410083 [2]中南大学机电工程学院,长沙410083

出　　处：《机械科学与技术》2014年第7期953-956,共4页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家重点基础研究发展计划项目(2013CB035404)资助

摘　　要：针对硬岩掘进机(TBM)破岩掘进过程中基础振动对非对称推进液压缸动态性能的影响,建立了非对称液压缸在基础振动下的动态响应数学模型,利用AMEsim仿真分析了不同基础振动参数下液压缸动态特性的变化规律。结果表明:基础振动降低液压缸动态稳定性,当基础振动幅值和频率组合为(3 mm,50 Hz)、(5 mm,40 Hz)、(8 mm,30 Hz)时,液压缸压力波动值约为无基础振动时无杆腔压力稳定值20 MPa的10%,达到液压缸正常工作允许的压力波动临界幅值;活塞位移波动趋势与压力波动趋势一致,波动幅值与振幅或振频成正相关,为降低基础振动对液压缸动态特性影响提供依据。Against the impact of foundation vibration on the dynamic performance of an asymmetric hydraulic cylinder during the process of TBM＇s rock break and excavation, the mathematical model of dynamic responses of the asymmetric hydraulic cylinder under the foundation vibration condition was built, and the dynamic characteristics under different foundation vibration parameters were simulated and analyzed. The simulation results show that： the foundation vibration reduces the dynamic stability of the hydraulic cylinder, and when the combinations of vibration amplitude and frequency are （ 3 mm, 50 Hz ）, （5 mm, 40 Hz ） and （8 mm, 30 Hz ）, the amplitude of the pressure fluctuction of the hydraulic cylinder is approximately 10% of rod chamber＇s stable pressure value 20 MPa without foundation vibration, reaching the allowed critical pressure fluctuation amplitude of the hydraulic cylinder＇s normal work; the trend of piston displacement＇s fluctuation is consistent with the pressure＇s fluctuation, and fluctuation＇s amplitude is positively correlated with vibration amplitude or frequency. These results provide the basis for reducing the foundation vibration＇s impact on the dynamic characteristics of the hydraulic cylinder.

关 键 词：基础振动 非对称液压缸 数学模型 AMESIM 动态特性 

分 类 号：TH137.51[机械工程—机械制造及自动化]