为了改善S1500/HZ超精密平面磨床的动态性能,应用模态分析的基本理论,得出了试验模态分析的理论和方法.根据SL500/HZ超精密平面磨床的实际工作状态和试验的实际环境条件,采用脉冲锤击法对SL500/HZ超精密平面磨床进行了试验模态分析,得到了该机床结构的前8阶模态参数和模态振型,然后对所得模态参数进行了参数识别,找出了机床结构的薄弱环节,进而提出了机床结构的改进方案.研究结果表明,该研究为进一步改善SL500/HZ超精密平面磨床的动态性能提供了结构改进的依据.%In order to improving the dynamic performance of the SL500/HZ ultra-precision surface grinding machining, the basic theory and methods of the experimental modal analysis was gotten from the basic theory of modal analysis.According to actual working conditions of the SL500/HZ ultra-precision surface grinding machine and the actual environmental conditions of the test, experimental modal analysis of the SL500/HZ ultra-precision surface grinding machine was made through the hannner testing, the modal parameters and mode shapes of the first stage to the eighth-order were obtained, the modal parameters of each order were analyzed, the weak links of the dynamic performance of the machine were found out.At last, the improvement program in the structure was designed for the weak link.The experimental results show that the research provides bases in the structure to improve the dynamic performance of the SL500/HZ ultra-precision surface grinding machine.
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