A new meshless approach for marine power component modelling using digital twin reduced-order technique
Engineering Analysis with Boundary Elements(2023)
摘要
In the background of the significant data era, green power represents the future development direction of ships. It is critical to establish fast-response marine power models to evaluate various green power-driven power components. However, when evaluating a finite model, the calculating often requires re-meshing of the model once the model parameters change, resulting in huge amount computing costs. The reduced-order model can address this issue by rapid calculation of the model responses; however, real-time computing of the reduced-order model is still a challenging task. In this paper, we study the basic principle of the digital twin reduced-order model and propose a digital twin reduced-order model. Firstly, the geometric model of a marine centrifugal pump is imported into ICEM meshing software for calculation domain meshing; Secondly, import the mesh file generated by ICEM software into Fluent for CFD numerical simulation and numerical simulation of the reduced-order model; finally, the reduced-order model is verified: under the rated working condition, the calculated head of reduced-order model is 31.98 m, the maximum speed of impeller edge is 24.4 m/s, and the minimum speed at the impeller shaft center is 0.0475 m/s. The errors are less than 1% compared to the theoretically calculated values. This study provides a proof basis for the high-accuracy model required by the fault detection technique based on the reduced-order model, and also proves that the fault detection method based on the reduced-order model is feasible.
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关键词
Digital twin,Marine centrifugal pump,Reduced-order model,Meshless modeling,Fault diagnosis
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