Accurate prediction of wind data and simulation of wind field characteristics are crucial to the wind load safety of large gantry cranes.To improve the simulation accuracy of wind data and wind field characteristics of large-scale gantry crane,the prediction accuracy of DES and RANS turbulence models was compared from pressure coefficient,wind coefficient and velocity field of measuring points by combining numerical simulation and wind tunnel test.The research results show that compared with RANS,the accuracy of pressure coefficient of main beam,the windward side of rigid leg front leg and the leeward side of rigid leg rear leg is higher when based on DES,with most experimental errors within 10%.However,for the pressure coefficient of rigid leg front leg leeward side and rigid leg rear leg windward side,the results based on RANS were closer to the experimental data.DES is better than RANS in wind coefficient prediction,and the prediction error of wind coefficient of the whole machine is only 0.894%.Therefore,the model selection should depend on the situation,and DES is the first choice if resources are sufficient.
维普
万方数据