Papers by Keyword: Optimized Design

Abstract: The casting process design of large cast steel supports is carried out, and the special integrated sand core and forged steel cast lugs are used to simplify the cavity manufacturing process. The ProCAST software was used to simulate the casting process of the stent, simulating the filling and solidification of the casting, and predicting the occurrence of defects such as shrinkage and shrinkage of the casting. According to the simulation results, the cause of the defects is analyzed, and the casting process of the stent is optimized. The simulation results show that the optimization scheme effectively reduces the casting defects and the surface of the stent is free from defects.

Abstract: An aluminium cross car beam (CCB) for new energy is designed with CATIA. And then,modal analysis is taken by using simulation software-NASTRAN. As nature frequencies can't meet the design target, optimization is performed according to the modal strain energy contour. After structure is strengthen, the first vertical nature frequency of the aluminum CCB(mounted on trimmed car body,with closures and interiors) reaches 35.4Hz.While the first lateral nature frequency reaches 36.5 Hz. Besides,comparing to steel CCB,the weight of the aluminum CCB reduces by4.4 kilogram.

Abstract: Based on the similarity theory, the horizontal tail scale model is designed and manufactured. Subsonic doublet lattice method is used to calculate unsteady aerodynamics, V-g method is used to solve the flutter determinant. Optimus software is used to optimize the thickness of the skin. The constraint condition is the frequency, MAC value and flexibility, and the objective function is flutter dynamic pressure. Flutter velocity of horizontal tail model optimized decreased 6%,and flutter frequency increased greatly. Horizontal tail scale model was test in wind tunnel. The finite element calculate results was very close with wind tunnel results, which verify the correctness of the finite element model and optimization models.

Abstract: This paper designed the self-insulation concrete block meeting the energy-saving standard in northeast severe cold zones and introduced the whole design process of this new self-insulation concrete block. The size of the block is 390mm*280mm*190mm. We designed 15 types of block altogether, used ANSYS finite element software to analyze the combined influence of thermal engineering, mechanics and unit weight, got the best block type Q3 and optimized it twice in mechanical property and thermal performance, made the load-carrying capacity of the self-insulation concrete block tend to be more reasonable, and improved the thermal performance at the same time.

Abstract: The screen pipe completion is the predominated method for heavy oil horizontal well in Liaohe Oilfield, accounting for 83.4% of the total completions. General steam injection has been used for the horizontal wells, resulting in a better exploitation percentage in heel part but a poorer exploitation percentage beyond 1/3 of the distance from the tiptoe to heel in horizontal well. As the concentric dual-tube steam injection technique for horizontal well has just been developed in Liaohe Oilfield, the related supporting technique is not enough. In this paper, researchers consider achieving horizontal wells concentric dual-tube steam injection optimized design as main goal so that the physical model will be established, and also the calculation methods for pressure, the calculation models for quality, heat loss and tapered string parameters along the wellbore will be provided during the concentric dual-tube steam injection for horizontal wells.

Abstract: In actual operation, the rising load will lead to the reduction of pressure because of the long delay of the boiler. It can lead to the main steam pressure lockout in severe cases. The proposed model is derived by the principle analysis of control object and the introduction of load feedforward. The unidirectional decoupling method is verified by the simulation in Matlab. Not only the decoupling has achieved good results, but also the performance of the control system has been greatly improved. All the above study are based on a 1000MW power unit.

Abstract: The progression of power transformer core is usually determined by the core diameter and the width and thickness of the silicon-steel sheet is determined by the graphing method. Therefore, coil section can’t be fully utilized. To analyze the manufacturing characteristics of power transformer core columns from the performance and material savings and the nonlinear integer regression programming model is established. Taking the circumscribed circle diameter is 800mm, progression equal to 17 as an example. The optimized design of column section is solved by using the MATLAB. The results show that the optimized design can increase the cross-section fill factor by 3.8% and the diameter of the core columns larger, the optimization results better.

Abstract: Tower crane hoisting system is the most important structural component of tower crane components. Its structural performance directly affects the performance of the overall tower crane. Combining the characteristics of The unconventional dedicate tower crane, established the mathematical model of hoisting system, and complied the particle swarm optimization algorithm program based on improved particle swarm optimization algorithm by MATLAB language, optimized analysis of hoisting system of The unconventional dedicate tower crane, and verified the optimization results by static analysis in the end. The result shows that the optimized analysis of tower crane hoisting system is viable and efficient by the improved particle swarm optimization algorithm.

Abstract: The badminton gymnasium of Beijing University of Technology is the main built gymnasium for Olympic Games in 2008 in Beijing. Based on the design requirement, the velocity in the playing-field should be less than 0.2m/s in the region of 9m above the playing-fields ground. To guarantee the design requirement, this paper uses the methods of Computational Fluid Dynamics (CFD) technology and field test to optimize and modify the original design of the cavity’s structure. After optimization and modification, plenum makes obvious sense on air distribution of structure of the cavity, which guarantees the 9100 swirl diffusers uniform air supply under the grandstand seats, the velocity in the playing-field is less than 0.2m/s, which meets the design requirement. The results can be referred to optimization design of air-conditioning ventilation system in large badminton gymnasiums.

Abstract: The target system for aerial defense artillery .has been widely used in the shooting training in aerial defense war. Since the performance of the target system has strong influence on the precision of the aerial defense shooting in the training process, the target system has been developed rapidly during the past decade. A novel target system has been proposed in this paper, the shooting principle is also put forward with some innovations and reasonable modification in the design process. In the system design part, the basic performance factors have been brought forward, including some necessary technical indicators and optimized design specification. Through the shooting test under the target system, a perfect performance has been obtained through observer glass experiments. The experiment results have strongly validated the rationalization and the reliability of the designed novel target system for aerial defense artillery.