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在噪声振动的隔离和阻尼处理中,测定声学材料,特别是粘弹性材料的动态杨氏模量和损耗因子具有重要意义.过去一般用悬臂梁或自由梁方法来测量,常用的仪器如B/K3930复模量仪、N-VES和Metravib粘弹谱仪等,这些方法各有特点,但都不能在频率域上连续测量.我们根据Pritz原理[1],新建
In the noise and vibration isolation and damping process, the determination of acoustic materials, especially the dynamic Young’s modulus and loss factor of viscoelastic material is of great importance.In the past generally used cantilever beams or free beam method to measure the commonly used instruments such as B / K3930 complex modulus, N-VES and Metravib viscoelastic spectroscopy, etc., these methods have their own characteristics, but they can not be continuously measured in the frequency domain.We according to the Pritz principle [1], the new