Papers by Keyword: Integrated Approach

Abstract: This study presents an integrated approach to the teaching of surface metrology and the regulation of electrochemical polishing process control parameters. The electropolishing processes permits different ranges of surface finish through different combinations of the process parameters of current density (J) and electropolishing time (t), and students must have a sound knowledge of the procedure for selecting filters (λ_s, λ_c, λ_f). Thus, experimental trials are undertaken to establish the influence of current density (J) and electropolishing time (t) on surface finish by measuring the arithmetic average roughness parameter (Ra), and setting the filters and measurement procedure for each range of surface finish. The integrated learning of both disciplines enables students to consolidate their knowledge on the methodology for measuring surface roughness (Ra), and to establish direct correlations between variation in process control parameters and the surface finish obtained by characterizing the behaviour of the process.

Abstract: This study aims to assess the influence of greenery shading and transparent surfaces on historical building’s energy demand under a retrofit point of view. To achieve this goal, the energy requirement of the whole building has been considered. In order to improve buildings energy efficiency several simulations have been performed. In particular, the effects of some interventions related to different windowed elements, characterized by progressively improved thermal properties, have been taken into account.

Abstract: In Europe, many regeneration projects are addressed to large urban distressed areas as a result of the dismissal of industrial sites and businesses and ensuing unemployment, poverty, environmental damage and social exclusion. In the attempt to contribute to the development of innovative policies for the integrated regeneration of deprived urban areas, this paper addresses the experience of the London’s South Bank project. Formerly home to factories and working-class houses, a number of integrated projects have converted this area into one of Europe’s most important cultural hubs, known for being packed with artistic opportunities and amenities that attract millions of visitors every year. After a brief description of the process through which the area has been transformed, this paper focuses on the strategies and feasibility factors that have led to a successful regeneration project.

Abstract: This paper presents an integrated approach to the design and analysis of an ultra-high speed air bearing spindle, by integrating the structural design, performance analysis and system optimization in a virtual design environment. Firstly, the ultra-high speed air bearing spindle is designed, including grooved hybrid air bearing, helical water cooling channel and built-in motor, etc; Subsequently, pneumatic hammer instability and whirl instability of air bearing are studied; The thermal-structural behaviors of the spindle system at ultra-high speeds are investigated by using structural FEA coupled CFD; Static and dynamic performance of spindle is studied to predict the stiffness, modes and natural frequencies of the spindle; Lastly, system optimizations are conducted to obtain optimal performance and dynamic behaviors of the spindle. The proposed integrated approach can be used to design an optimal ultra-high speed air bearing spindle.

Abstract: The porous media for liquid transporting and mechanical analysis, which are the hotspot studies in contaminant transport and machinery manufacturing, is hard to model in the computing simulation for the complexity of the media’s porosity. In the paper, an integrated approach is proposed to model the porous media with the framework of but not limited to sphere particles. Firstly, a series of particles are generated according to the grading curve in a closed box with the PFC3D, and then let the particles deposit freely for the gravity. After that the position and radium of each particle are exported to a file for import of AUTOCAD, where the particles are re-generated by the VBA script and the model for particles is constructed. The needed model is the porosity among the particles, so the model size is determined by a block and the model is gotten with the Boolean Operation which subtracts the particles from the block. And then with the different boundaries, the water transporting simulation in the porous media model is carried out with the Finite Volume Method (FVM). The results are proved reasonable by the previous studies.

Abstract: There are several efforts for an advanced on-line health monitoring of a piping system by using a chemical condition monitoring, a X-ray radiography and a ultrasonic techniques. In order to increase the confidence of the understanding on the health condition of the underlying piping system, an integrated and multi-disciplinary approach has been adopted in this paper. Flow-Accelerated Corrosion (FAC) under an undesirable combination of the water chemistry, flow velocity and material composition has usually caused a pipe wall thinning. The condition monitoring tests on a piping elbow of a piping system have been conducted by using several advanced sensors such as an accelerometer, ultrasonic device, and chemical sensors.