【摘要】 试验模态分析技术(EMA)作为一种结构检测及安全评估的方法已是一种趋势。它是根据测量模态参数(固有频率、阻尼比、振型等)相对于正常值产生的变化,并通过相关分析与识别来判断结构安全程度。该文通过对模型梁进行试验模态分析,识别系统的模态参数,研究模态技术在实际运用的试验方法及影响因素。更多还原

【Abstract】 The experiment modal analysis technology(EMA) taking as one kind of structure examination and the security evaluation method already has been one tendency.It is according to the survey modal parameter(natural frequency,damping ratio,mode of vibration and so on) relative to the changes resulting from normal and through the relevant analysis and recognition to determine the structural safety.In this paper,the experiment modal analysis is carried to model beam,the model parameter of system is recognized,and the experiment method and influential factors of the model technology in the practical application are studied.更多还原