典型海底条件下抛物方程声场计算方法的缩比实验验证

为验证抛物方程近似方法在声场计算中的正确性，进行了模拟弹性海底的声传播测量实验.实验中利用质地均匀的聚氯乙烯（PVC）板模拟弹性海底，在消声水池中分别测量了水平和倾斜时海底下的声传播损失.理论研究中，应用抛物方程方法及在其基础上发展的坐标映射抛物方程方法仿真计算了2种实验环境下的声传播损失曲线.实验结果表明，仿真计算结果与实测结果吻合较好，充分验证了所研究计算方法的正确性.

Verification of the Calculation of Acoustic Field with Typical Bottom Based on Parabolic Equation in Scaled Tank Experiment

In order to research the calculation of acoustic field based on parabolic equation (PE), a simulation experiment was carried out to analyze the underwater sound propagation with elastic bottom. In the test, a polyvinyl chloride (PVC) slab is used to simulate the elastic bottom, and the transmission losses for two types of seabed, including horizontal and sloping, are measured in an anechoic tank. In the simulation, PE method is used to calculate the horizontal seabed model, and the inclined is calculated with the coordinate mapping PE method. The accuracy of the two PE methods was verified by the agreement between the numerical simulation and the results of the measured experimental data.