摘要
针对动态弹性模量实验中多个频率处出现共振峰且峰值较大,通过实验进行了分析。当出现共振峰时,先让波形稳定1～2min,再用一塑料夹子分别夹紧试样与支撑片。观察两种情况下,哪一种情况共振峰减小的程度大。结果表明,最小的共振频率并非试样的振动基频。较大的共振频率为试样的高次谐振频率。
Different resonant frequencies appeared in elastic modulus experiment are analyzed based on the experiment and theory. When the formant appeared,make it level off for one to two minute, then use a plastic clip clamp the central section of the sample and the act of supporting. Observe that the formant was minished by a long way at which times. It is shown that, the lowest resonant frequencies are not fundamental frequency, the biggish frequency is other resonant frequencies.
出处
《大学物理实验》
2010年第4期47-49,62,共4页
Physical Experiment of College
关键词
弹性模量
共振频率
基频
elastic modulus
resonant frequency
fundamental frequency
