【摘要】 本文概述了结构动力特性的测试方法；列表综合了用图解分析法确定模态参数的 公式，总结了运用图解法识别复模态参数的实践体会，并提出了判断实测数据可靠性 与选择实测数据的依据；介绍了模态参数识别程序；列出了运用图解分析法和计算机 分析法对国产６０万■汽机基础模型进行振动模态参数识别的对比结果。文中还讨论 了关于利用实测数据建立数学模型问题，并结合动力基础实际给出了在单点扰力及多 点扰力下．复模态响应值的计算公式。更多还原

【Abstract】 The measuring method of dynamic characteristics in structures is described in this paper.Some formulae to define the modal parameters by diagram ana- lysis method are, synthesized in a list. Some experiences to identify the complex modal parameters by diagram analysis method are summarized. In this paper, the grounds to judge the reliability on experimental data and to select the experimental data are proposed. The program to identify the complex modal parameters is designed here. The comparison results to identify the vibration. modal parameters by diagram analysis method and computer analysis method for the steam turbine foundation model of 600,000KW made in China are given. The problem of forming a mathematical model by test data is also discussed, and the computing formulae of complex modal response value for the disturbing forces acting on single-point or multi-points according to practical cases of power foundation are also given in this paper.更多还原