US 11,868,690 B1
Method, device, electronic equipment and medium for analyzing disaster prevention and mitigation effectiveness of ecological seawall
Peng Hou, Guangzhou (CN); Xiaozhang Hu, Guangzhou (CN); Xiaojian Liu, Guangzhou (CN); Xiaowei Zhu, Guangzhou (CN); Qisong Wang, Guangzhou (CN); Qiang Wang, Guangzhou (CN); Cheng Liu, Guangzhou (CN); Xia Liu, Guangzhou (CN); Shijun Wang, Guangzhou (CN); Huiqun Guo, Guangzhou (CN); Qinqin Liu, Guangzhou (CN); Chenqi Zhou, Guangzhou (CN); Honglu Yue, Guangzhou (CN); Zhongjie Deng, Guangzhou (CN); and Jingyi Li, Guangzhou (CN)
Assigned to Pearl River Water Resources Research Institute, Guangdong (CN)
Filed by Pearl River Water Resources Research Institute, Guangzhou (CN)
Filed on Aug. 30, 2023, as Appl. No. 18/458,829.
Int. Cl. G06F 30/28 (2020.01); G06F 113/08 (2020.01); G06F 111/10 (2020.01)
CPC G06F 30/28 (2020.01) [G06F 2111/10 (2020.01); G06F 2113/08 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A method for analyzing a disaster prevention and mitigation effectiveness of an ecological seawall, comprising:
performing a seawall ecologicalization on a target seawall by using preset vegetations, environment-friendly materials and ecological engineering methods to obtain a target ecological seawall;
establishing three-dimensional space hydrodynamic force for the target ecological seawall by using a preset Navier-Stokes equation and a preset PIMPLE algorithm, wherein the establishing the three-dimensional space hydrodynamic force for the target ecological seawall by using the preset Navier-Stokes equation and the preset PIMPLE algorithm comprises:
obtaining a drag force and an inertia force of a plant population of the target ecological seawall;
filtering the Navier-Stokes equation with a three-dimensional incompressibility according to a preset mass conservation law and a momentum conservation law, the drag force and the inertia force to obtain a control equation, wherein the control equation is:

OG Complex Work Unit Math
wherein ūi represents a volume average velocity, ueff represents a volume average effective viscosity, p represents the volume average dynamic pressure, ρ represents a volume average density, FD,i represents the drag force and Fl,i represents the inertia force, xi represents an i-th horizontal component of a velocity, xj represents a j-th vertical component of the velocity, gi represents a gravitational acceleration of the i-th component, t represents a fluid flow time, ρ{ūi} represents a fluid volume density at an average velocity of a horizontal volume component, ūj represents an average velocity of a volume vertical component, wherein the drag force and the inertia force are used to consider momentum loss caused by the vegetations in this model;
solving the control equation by using the PIMPLE algorithm to obtain a pressure field and a velocity field with a mass conservation;
performing a grid area discretization on the control equation by using a finite volume method to obtain a grid cell area;
setting a boundary condition for the grid cell area, and dividing the grid cell area into a wave-making area and a wave-absorbing area by using the boundary condition; and
establishing the three-dimensional space hydrodynamic force according to the pressure field, the velocity field, the wave-making area and the wave-absorbing area;
carrying out a wave climbing simulation on a dike body and a wave overtopping simulation on a dike top of the target ecological seawall through the three-dimensional space hydrodynamic force to obtain a wave overtopping index;
calculating a wave-flow bottom shear stress of the target ecological seawall by using a preset coastal hydrodynamic model, calculating a bed load sediment transportation volume according to the wave-flow bottom shear stress, and calculating a suspended load sediment transportation volume by using a preset convection-diffusion equation;
mapping the three-dimensional space hydrodynamic force to a two-dimensional bed surface by using a preset finite area method, calculating a two-dimensional bed surface change index according to the suspended load sediment transportation volume and the bed load sediment transportation volume, and determining a development index of tidal flats in front of dike of the target ecological seawall by using a preset Exner equation according to the two-dimensional bed surface change index; and
calculating a disaster prevention and mitigation effectiveness grade of the target ecological seawall according to the wave overtopping index and the development index of the tidal flats in front of dike.