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《Chinese Journal of Underground Space and Engineering》 2017-03
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Study on Inverse Problem in Underground Road Pollutants Convection Diffusion Based on Adjoint Assimilation Method

Li Zhiyong;Zhang Hao;Chen Chao;Deng Yiwen;Li Qiong;College of Architecture Engineering,North China University of Technology;College of Architecture and Civil Engineering,Beijing University of Technology;  
Based on the adjoint assimilation method of optimal control theory of partial differential equation,a pollutant convection diffusion inverse problem model of urban tunnel is established and solved.This model is combined with dynamic model and observed data to solve pollutant diffusion problem.The source term of convection diffusion equation was taken as an example to make inversion calculation,and the calculated value of source term was used to predict the concentration of pollutants.Research shows that,comparing with the calculated result of direct model,the source term calculated by inverse problem method can dynamic reflect the influence of factors such as tunnel traffic,speed,discharge characteristics.The calculated values of inverse problem model are close to the measured ones.By using various pollutants objective observation data,this method can be effectively used to identify some uncertain parameters.Forecast analysis and prediction of pollutant concentration can be better realized.
【Fund】: “十二五”国家科技支撑计划资助项目(2012BAJ01B03);; 国家自然科学基金(51378024);; 北方工业大学优秀青年教师培养计划
【CateGory Index】: U491.9;X734
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