Based on k-ε turbulence model, the distributions of the velocity field, temperaturefield, thermal comfort index, PMV-PPD (Predicted Mean Vote-Predicted PercentageDissatisfied), and air quality index, mean age of air ...Based on k-ε turbulence model, the distributions of the velocity field, temperaturefield, thermal comfort index, PMV-PPD (Predicted Mean Vote-Predicted PercentageDissatisfied), and air quality index, mean age of air were obtained of Zhouyuanshan CoalMine in-650 m level of a heading face by CFD(Computational Fluid Dynamics)software,Airpak 2.0.Moreover, the human thermal comfort and the air quality of the heading facewere analyzed with PMV-PPD and mean age of air indices, which received an intuitivevisualization and accurate evaluation results.In order to create a safe, comfortable, andeconomical underground operating environment, a scientific, rational, and comprehensiveprediction and evaluation needed to provide a theoretical and technical basis for coal mineventilation, cooling, heat harm treatment, and prevention.Meanwhile, from the humanthermal comfort and air quality to research the underground environment, it embodied theconcept of being human oriented.展开更多
The process of optimized placement of long-term health monitoring sensors for large bridges generally begins with finite element models, but there will arise great discrepancies between theoretically-calculated result...The process of optimized placement of long-term health monitoring sensors for large bridges generally begins with finite element models, but there will arise great discrepancies between theoretically-calculated results and actual measurements.Therefore, rectified finite element models need to be rectified by virtue of model rectifying technology. Firstly, the result of construction monitoring and finished state load test is used to real-time modification of finite element model. Subsequently, an accurate finite element model is established. Secondly, the optimizing the layout of sensor with following orthogonality guarantees orthogonal property and linear independence for the measured data. Lastly, the effectiveness and feasibility of method in the paper is tested by real-time modifying finite element model and optimizing the layout of sensor for Nujiang Bridge.展开更多
基金Supported by the National Science Foundation of China(50974059)the State Administration of Safety(05-296)
文摘Based on k-ε turbulence model, the distributions of the velocity field, temperaturefield, thermal comfort index, PMV-PPD (Predicted Mean Vote-Predicted PercentageDissatisfied), and air quality index, mean age of air were obtained of Zhouyuanshan CoalMine in-650 m level of a heading face by CFD(Computational Fluid Dynamics)software,Airpak 2.0.Moreover, the human thermal comfort and the air quality of the heading facewere analyzed with PMV-PPD and mean age of air indices, which received an intuitivevisualization and accurate evaluation results.In order to create a safe, comfortable, andeconomical underground operating environment, a scientific, rational, and comprehensiveprediction and evaluation needed to provide a theoretical and technical basis for coal mineventilation, cooling, heat harm treatment, and prevention.Meanwhile, from the humanthermal comfort and air quality to research the underground environment, it embodied theconcept of being human oriented.
基金Funded by the Special Found of the Ministry of Education for Doctor Station Subject(No.20115522110001)
文摘The process of optimized placement of long-term health monitoring sensors for large bridges generally begins with finite element models, but there will arise great discrepancies between theoretically-calculated results and actual measurements.Therefore, rectified finite element models need to be rectified by virtue of model rectifying technology. Firstly, the result of construction monitoring and finished state load test is used to real-time modification of finite element model. Subsequently, an accurate finite element model is established. Secondly, the optimizing the layout of sensor with following orthogonality guarantees orthogonal property and linear independence for the measured data. Lastly, the effectiveness and feasibility of method in the paper is tested by real-time modifying finite element model and optimizing the layout of sensor for Nujiang Bridge.
