Research On 3D Modeling And Energy Dissipation Design Of Sluice Based On BIM Technology

The functions of visualization,parameterization,collaboration,and scheme simulation of BIM technology have improved the level of engineering design and laid the foundation for the life cycle management of hydraulic structures.However,there are still some problems in the hydraulic design stage of BIM,such as low modeling efficiency,the creation and application of geological models,and the lack of hydraulic calculation modules in modeling software.These problems restrict the promotion and application of BIM in hydraulic engineering.Aiming at such modeling and calculation problems,this paper takes the sluice as a research carrier,and combines the conventional methods of BIM software,visual programming,and secondary development to establish a sluice model,and then uses the model for numerical simulation calculation of the sluice energy dissipator to solve the sluice.The problem of low energy dissipation efficiency of energy dissipator is put forward,and suggestions are given for the optimization of energy dissipator.In the modeling research,Revit was selected as the modeling software.The basic model of the sluice is established through the "family",and the geological model and pile foundation are laid out using Dynamo visual programming.One-click layout of the stilling pier is realized through secondary development,thereby creating the sluice model and improving the modeling efficiency.In the aspect of combining BIM model with numerical simulation calculation,the filtering function of BIM software is used to export the intermediate format file for the pre-processing stage of numerical simulation.In the numerical simulation calculation of energy dissipator,the RNG k-? model and VOF model are selected to simulate the water flow in Fluent,so as to obtain the energy dissipator's velocity,water surface line,floor pressure,and energy dissipation efficiency.analysis.The original energy dissipator of the sluice is designed to have a low Froude number water jump and low energy dissipation efficiency.In order to solve such problems,four original optimization schemes were selected for numerical simulation calculation.Comparing the calculation results,the energy dissipation efficiency of the three schemes with auxiliary energy dissipator increased.Without dismantling the original stilling pool,the best optimization plan is to add stilling pier in the stilling pool.In order to further increase the energy dissipation effect of the stilling pier,the position and spacing(cross-section ratio)of the stilling pier in the stilling pool are optimized.The relationship curves of the position of the stilling pier,the cross-section ratio and the energy dissipation efficiency are obtained.The optimal position of the stilling pier is L3 = 1.5m and the best cross-section ratio R = 55%.By studying BIM modeling methods and water flow simulation calculations,the modeling methods have been broadened,the efficiency of numerical simulation experiments has been improved,the synergy between BIM and numerical simulation has been enhanced,suggestions have been made for the optimal design of energy dissipators,and they have provided similar engineering designs.reference.