基于数值模拟技术及有关振动理论，提出了一种建立液体火箭发动机燃烧室声腔模型的方法。为验证方法的可行性，建立了用于带声腔燃烧室全场数值模拟的分区解法，利用这两种方法对同一过程进行的计算表明建模方法是可行的 Based on the numerical simulation technology and the related vibration theory, a method of establishing acoustic cavity model of the liquid rocket engine combustion chamber was proposed. In order to verify the feasibility of the method, a partitioning solution for full-field numerical simulation of a chamber with acousto-cavity is established. The calculation of the same process by these two methods shows that the modeling method is feasible