Abstract: When an ultrasonic wave propagates in a liquid,periodic modulation occurs in the density and
refractive index of the liquid.This modulation establishes a quantitative mathematical relationship between the
liquid's bulk modulus,elastic coefficient,longitudinal viscosity coefficient and the propagation velocity and
attenuation coefficient of the ultrasonic wave.Based on the acousto-optic effect,the mathematical expressions for
several mechanical parameters of the liquid are derived.The ultrasonic velocity and attenuation coefficient in
the liquid are measured by using an ultrasonic grating,and then the bulk modulus,elastic coefficient and
longitudinal viscosity coefficient of the liquid are further obtained. Compared with traditional measurement
methods,the proposed method has the advantages of non-contact,high precision and real-time measurement.
姚文畅, 刘艳峰 . 基于声光效应分析并测量液体的几种力学特性参数#br#[J]. 大学物理实验, 2026, 39(3): 47-51.
YAO Wenchang, LIU Yanfeng . Analysis and Measurement of Several Mechanical Characteristic Parameters of Liquids Based on Acousto-Optic Effect#br#. Physical Experiment of College, 2026, 39(3): 47-51.