For the first time, transient seismic-induced oscillations inside an actual harbor are investigated using a fully nonlinear Boussinesq-type wave model. To this end, the open-source code FUNWAVE-TVD, developed by Shi et al. (2012), is extended to include seismic effects by adding a time-dependent forcing term to the governing equations. This extension is fully validated against analytical solutions and experimental data available in the literature.

Uni-directional harmonic seismic excitation is considered as an approximation in the case study of Hambantota Port. Results reveal that the natural modes of Hambantota Port with periods of O (100–1000 s) can be triggered by seismic disturbances with periods of O (1 s). Some modes that are generated immediately under the excitation are found to be those of sloshing. Thus, a possible mechanism for the seismic-induced long-period harbor oscillations is proposed using a sloshing theory. Subsequently, it is determined that the seismic direction has significant effects on the excitation of natural modes and the energy decay rate. Lastly, the seismic influence on the wave motions inside the harbor including a consideration of the incident waves from the open sea is examined.

首次使用完全非线性的Boussinesq型波动模型研究了实际港口内部的瞬态地震诱发的振荡。为此，Shi等人开发了开放源代码FUNWAVE-TVD。（2012）扩展到包括地震影响，方法是在控制方程中添加一个与时间有关的强迫项。此扩展已针对文献中提供的分析解决方案和实验数据进行了充分验证。

在汉班托塔港的案例研究中，单向谐波地震激励被视为近似值。结果表明，周期为O（100–1000 s）的汉班托塔港口的自然模式可以由周期为O（1 s）的地震扰动触发。发现在激发下立即产生的一些模式是晃动的那些。因此，提出了一种基于晃动理论的地震诱发长周期港口振动的可能机制。随后，确定地震方向对自然模式的激发和能量衰减率具有显着影响。最后，研究了地震对港口内部波浪运动的影响，其中包括考虑来自公海的入射波。