Hybrid Tsunami Simulation Using 2D-3D Coupled Particle Analysis
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Solution Overview
Problem
Current simulation methods, such as the SPH method and two-dimensional propagation simulators, face challenges in handling wide-range tsunami wave propagation and accurately calculating wave pressure and wave power, especially in complex port areas with three-dimensional characteristics, due to high calculation loads and difficulties in handling large fluid movements.
Innovation Solution
A simulation program and apparatus that perform two-dimensional propagation calculations over wider areas and three-dimensional particle method calculations in regions with complex landforms, using a hybrid approach to calculate flow rates and water levels, allowing for accurate simulation of tsunami movements by interpolating boundary conditions and managing particle interactions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the SPH method is used for wide-range tsunami propagation simulation, then the accuracy of wave pressure and wave power calculation is improved, but the calculation amount becomes too large to handle
Solution Approach 1:
The simulation domain is divided into multiple sub-domains, each handled by a separate calculation unit. The coordination server manages these distributed units to perform tsunami propagation simulations across different regions simultaneously, thereby reducing the calculation burden on any single unit while maintaining overall simulation accuracy.
Solution Approach 2:
The patent transitions from traditional single-machine sequential processing to a distributed multi-dimensional processing architecture. By introducing spatial distribution of calculation units and temporal parallelism through coordination, the system handles wide-range tsunami propagation without overwhelming computational load on individual processors.
2Productivity
If conventional two-dimensional propagation simulators are used, then the calculation load is reduced, but the ability to handle complex three-dimensional landforms in port areas is insufficient
Solution Approach 1:
Different calculation units are assigned to handle different types of regions with appropriate methodologies. Coastal areas with complex three-dimensional landforms are processed with specialized algorithms that account for vertical structure, while open ocean regions use more efficient two-dimensional models, optimizing both accuracy and computational efficiency for each locale.
Solution Approach 2:
The system dynamically adapts the simulation methodology based on the characteristics of each region. Calculation units can switch between different computational approaches depending on whether they are processing simple propagation zones or complex coastal areas, allowing the system to maintain low calculation loads while handling diverse terrain types.
3Device complexity
If a fixed buffer region is used in hybrid SPH-Boussinesq calculations, then the implementation is simplified, but SPH particles cannot be dynamically generated or eliminated to adapt to changing tsunami conditions
Solution Approach 1:
The buffer region boundaries and particle generation/elimination criteria are made dynamic rather than fixed. Calculation units adjust the buffer region extent and particle management based on real-time tsunami propagation conditions, allowing the system to adapt to varying wave intensities and propagation stages while maintaining manageable implementation complexity through systematic control rules.
Data Source
AI summary
A computer is caused to execute processes of: calculating a flow rate and a water level of a continuum at each point on a two-dimensional plane in a first region, on the basis of input data; expressing the continuum in a second region contained in the first region as an assembly of particles, and subjecting the state of the each particle to a three-dimensional analysis based on the calculated flow rate and water level.