On the basis of studying a new relaxation mechanism, we revised the rate equation of anelasric strain, and then using Boltzmann superposition principle, the formula of ultrasonic attenuation with IRD is derived.

• 在研究新的弛豫机制的基础上,修正了滞弹性应变的速率方程,并利用玻耳兹曼叠加原理,导得具有红外发散的超声吸收公式。