【作者】 董阳； 朴胜春； 郑广赢；

【Author】 DONG Yang;PIAO Sheng-chun;ZHENG Guang-ying;Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University;College of Underwater Acoustic Engineering,Harbin Engineering University;

【机构】 哈尔滨工程大学水声技术重点实验室； 哈尔滨工程大学水声工程学院；

【摘要】 谱元法属于广义有限元法,是建立在波动方程的变分或弱形式理论基础上,是求解偏微分方程的一种有效的数值计算方法。它将有限元法和伪谱法相结合,不仅具有有限元法处理复杂结构的几何灵活性,还具有伪谱法高精度和快速收敛的特性。本文利用谱元法程序SPECFEM2D首先计算了水平分层介质的时域波形,并将计算的传播损失与SCOOTER的结果进行了对比验证,显示出该方法用于仿真海洋声传播的可能性。并进一步计算了楔形海底计算结果,验证了其仿真距离有关波导的能力。更多还原

【Abstract】 The spectral element method, which belongs to the generalized finite element method, is based on the variational or weak form theory of wave equation, and is an effective numerical method for solving partial differential equations. In this paper, the time domain waveform of the horizontal layered media is given, which shows that the method can be used to simulate the ocean acoustic propagation, and the transmission loss is verified by the comparison with scooter. Finally,we present the result of the wedge bottom, which verifies the capability of the simulation of range-dependent waveguide.更多还原