DP
D.G. Pradnyanata
info
Please Note
<p>This page displays the records of the person named above and is not linked to a unique person identifier. This record may need to be merged to a profile.</p>
1 records found
1
The demand for hydroelastic studies in floating structures applications has increased in recent years. Their applicability extends the potential for floating structure development in offshore environments. For instance, it is applicable to offshore photovoltaic (OPV), wave energy converter (WEC), floating airport, and future floating city development. However, this branch of fluid-structure interaction (FSI) problem requires a solid foundation in understanding the two-way interaction between the floating structure and the fluid.
Computational methods are the most suitable option for studying hydroelasticity due to the ease of problem setup and are comparatively cheaper than experiments. Despite this advantage, this method also faces problems in the coupling strategy that lead to high computational cost. According to a previous study, monolithic coupling shows better computational performance than partitioned coupling. But since it solves a high-order matrix system, it may still require a long computation time. This research aims to investigate the applicability of a reduced-order system in solving the hydroelastic problem by using the monolithic finite element framework. Modal superposition methods will be employed within the framework to compare the computational time between the full-order and reduced-order models.
A reduced-order-modelling (ROM) framework through modal superposition is developed in this research, including a new structural formulation using Mindlin theory to cover a wide range of floating structure problems in a unified formulation. The analysis is conducted using the Gridap FEM library in the Julia programming language and comprises: 1) dry and wet modal analysis, 2) frequency-dependent added mass, added damping, and force calculation, 3) modal superposition analysis, and 4) full-order monolithic FEM analysis.
This research has developed two modal superposition frameworks, namely the matrix and integration methods. These methods have been proven to accurately estimate the full-order solutions and are in good agreement with the existing literature. The matrix method shows better computational performance compared to the full-order solution, up to hundreds of times faster, and up to thousands of times faster than the integration method. The integration method requires longer running time than the full-order solution due to the expanded weak formulation. Furthermore, this research also compared the dry and wet modal solutions and found that the dry modal solution performs better than the wet solution. The wet modal analysis is solved by using a nonlinear eigenvalue problem (NLEP). However, the method used in this research still needs to be validated with a more robust NLEP method for subsequent research.
Overall, this research shows good applicability of the reduced-order model using the monolithic FEM framework. Both methods give a good estimation of the full-order solutions. Despite the heavy computational time, the integration method provides a good implementation of modal superposition directly to the weak formulation within the Gridap ecosystem. The newly developed unified structural formulation also shows good applicability in covering a wide range of VLFS hydroelastic cases. ...
Computational methods are the most suitable option for studying hydroelasticity due to the ease of problem setup and are comparatively cheaper than experiments. Despite this advantage, this method also faces problems in the coupling strategy that lead to high computational cost. According to a previous study, monolithic coupling shows better computational performance than partitioned coupling. But since it solves a high-order matrix system, it may still require a long computation time. This research aims to investigate the applicability of a reduced-order system in solving the hydroelastic problem by using the monolithic finite element framework. Modal superposition methods will be employed within the framework to compare the computational time between the full-order and reduced-order models.
A reduced-order-modelling (ROM) framework through modal superposition is developed in this research, including a new structural formulation using Mindlin theory to cover a wide range of floating structure problems in a unified formulation. The analysis is conducted using the Gridap FEM library in the Julia programming language and comprises: 1) dry and wet modal analysis, 2) frequency-dependent added mass, added damping, and force calculation, 3) modal superposition analysis, and 4) full-order monolithic FEM analysis.
This research has developed two modal superposition frameworks, namely the matrix and integration methods. These methods have been proven to accurately estimate the full-order solutions and are in good agreement with the existing literature. The matrix method shows better computational performance compared to the full-order solution, up to hundreds of times faster, and up to thousands of times faster than the integration method. The integration method requires longer running time than the full-order solution due to the expanded weak formulation. Furthermore, this research also compared the dry and wet modal solutions and found that the dry modal solution performs better than the wet solution. The wet modal analysis is solved by using a nonlinear eigenvalue problem (NLEP). However, the method used in this research still needs to be validated with a more robust NLEP method for subsequent research.
Overall, this research shows good applicability of the reduced-order model using the monolithic FEM framework. Both methods give a good estimation of the full-order solutions. Despite the heavy computational time, the integration method provides a good implementation of modal superposition directly to the weak formulation within the Gridap ecosystem. The newly developed unified structural formulation also shows good applicability in covering a wide range of VLFS hydroelastic cases. ...
The demand for hydroelastic studies in floating structures applications has increased in recent years. Their applicability extends the potential for floating structure development in offshore environments. For instance, it is applicable to offshore photovoltaic (OPV), wave energy converter (WEC), floating airport, and future floating city development. However, this branch of fluid-structure interaction (FSI) problem requires a solid foundation in understanding the two-way interaction between the floating structure and the fluid.
Computational methods are the most suitable option for studying hydroelasticity due to the ease of problem setup and are comparatively cheaper than experiments. Despite this advantage, this method also faces problems in the coupling strategy that lead to high computational cost. According to a previous study, monolithic coupling shows better computational performance than partitioned coupling. But since it solves a high-order matrix system, it may still require a long computation time. This research aims to investigate the applicability of a reduced-order system in solving the hydroelastic problem by using the monolithic finite element framework. Modal superposition methods will be employed within the framework to compare the computational time between the full-order and reduced-order models.
A reduced-order-modelling (ROM) framework through modal superposition is developed in this research, including a new structural formulation using Mindlin theory to cover a wide range of floating structure problems in a unified formulation. The analysis is conducted using the Gridap FEM library in the Julia programming language and comprises: 1) dry and wet modal analysis, 2) frequency-dependent added mass, added damping, and force calculation, 3) modal superposition analysis, and 4) full-order monolithic FEM analysis.
This research has developed two modal superposition frameworks, namely the matrix and integration methods. These methods have been proven to accurately estimate the full-order solutions and are in good agreement with the existing literature. The matrix method shows better computational performance compared to the full-order solution, up to hundreds of times faster, and up to thousands of times faster than the integration method. The integration method requires longer running time than the full-order solution due to the expanded weak formulation. Furthermore, this research also compared the dry and wet modal solutions and found that the dry modal solution performs better than the wet solution. The wet modal analysis is solved by using a nonlinear eigenvalue problem (NLEP). However, the method used in this research still needs to be validated with a more robust NLEP method for subsequent research.
Overall, this research shows good applicability of the reduced-order model using the monolithic FEM framework. Both methods give a good estimation of the full-order solutions. Despite the heavy computational time, the integration method provides a good implementation of modal superposition directly to the weak formulation within the Gridap ecosystem. The newly developed unified structural formulation also shows good applicability in covering a wide range of VLFS hydroelastic cases.
Computational methods are the most suitable option for studying hydroelasticity due to the ease of problem setup and are comparatively cheaper than experiments. Despite this advantage, this method also faces problems in the coupling strategy that lead to high computational cost. According to a previous study, monolithic coupling shows better computational performance than partitioned coupling. But since it solves a high-order matrix system, it may still require a long computation time. This research aims to investigate the applicability of a reduced-order system in solving the hydroelastic problem by using the monolithic finite element framework. Modal superposition methods will be employed within the framework to compare the computational time between the full-order and reduced-order models.
A reduced-order-modelling (ROM) framework through modal superposition is developed in this research, including a new structural formulation using Mindlin theory to cover a wide range of floating structure problems in a unified formulation. The analysis is conducted using the Gridap FEM library in the Julia programming language and comprises: 1) dry and wet modal analysis, 2) frequency-dependent added mass, added damping, and force calculation, 3) modal superposition analysis, and 4) full-order monolithic FEM analysis.
This research has developed two modal superposition frameworks, namely the matrix and integration methods. These methods have been proven to accurately estimate the full-order solutions and are in good agreement with the existing literature. The matrix method shows better computational performance compared to the full-order solution, up to hundreds of times faster, and up to thousands of times faster than the integration method. The integration method requires longer running time than the full-order solution due to the expanded weak formulation. Furthermore, this research also compared the dry and wet modal solutions and found that the dry modal solution performs better than the wet solution. The wet modal analysis is solved by using a nonlinear eigenvalue problem (NLEP). However, the method used in this research still needs to be validated with a more robust NLEP method for subsequent research.
Overall, this research shows good applicability of the reduced-order model using the monolithic FEM framework. Both methods give a good estimation of the full-order solutions. Despite the heavy computational time, the integration method provides a good implementation of modal superposition directly to the weak formulation within the Gridap ecosystem. The newly developed unified structural formulation also shows good applicability in covering a wide range of VLFS hydroelastic cases.