The thermodynamic and acoustic behaviors of prefabricated composite wall panel were investigated based on the heat transmission and acoustic principles. Moreover, the thermal conductivity formula of the prefabricated composite wall panel based on thermal conductivity equivalence method was proposed by deducing the solving process of thermodynamic parameters. Changes of sound reduction index and sound pressure level (SPL) of the prefabricated composite wall panel with sound frequency range were analyzed by experimental test and numerical simulation. The research results demonstrate that the thermal conductivity of wall panel can be calculated accurately by the thermal conductivity equivalence method. The calculation model of sound reduction index can be used to determine the sound reduction index in the middle and low frequency ranges. The designed wall panel has satisfying heat insulation and sound insulation with a heat transfer coefficient of 0.55 W/m²·K and about the weighted standard acoustic pressure difference (D_nT,w) of 42 dB.

基于传热和声学原理，研究了预制复合墙板的热力学和声学特性。通过推导热力学参数求解过程，提出了基于热导当量法的预制复合墙板热导率公式。通过实验测试和数值模拟，分析了预制复合墙板的降声指标和声压级（SPL）随声频范围的变化。研究结果表明，采用导热系数当量法可以准确计算出墙板的导热系数。降噪指标的计算模型可用于确定中低频范围的降噪指标。² ·K，加权标准声压差（D _nT，w）为42 dB。