Advanced Materials Research Vols. 102-104

Abstract: How to satisfy individual demands as possible as product can is important for facilitating mass customization, one key technique of which is to survey easy-understood product customization model for customers. First, through fully defining product customization model and comparing to conventional product model, the formalized description of product customization model is given. Second, Analytic Hierarchy Process-based mathematic evaluation model of customization elements is established. Third, modeling process of product customization model is proposed. Finally, the proposed strategy is demonstrated effective in an instance of conference timer customization model.

Abstract: The buckling behavior of thin-walled steel structures under load is still imperfectly understood, in spite of much research over the past 50 years. In this paper, the buckling behaviors of H-section columns under compression have been simulated with ANSYS. In the analysis, contact pairs between column ends and end blocks have been introduced into the model, and the load carrying capacity of the columns with four kinds of end constraint conditions and various typical initial geometric imperfections has been calculated and discussed. The results indicate that the load carrying capacity is most sensitive to the flexural imperfection, and the constraint condition cannot change the imperfection sensitivity of a column under compression, but improving restrain condition can heighten the load carrying capacity. They are helpful to the use and the tolerance control in the manufacture process of thin-walled H-section steel structures.

Abstract: With the development of manufacturing, obtaining 3D data of objects surface effectively and precisely has been important. In this paper, laser radar is selected to gain 3D geometric data by comparing the current digital measurement techniques, and the measurement principle of laser radar is discussed in detail. For obtaining the whole surface points cloud of work piece and reducing the error of station moving, the mathematical model of station moving is established. This paper also analyzes the characteristics of points cloud data collected using laser radar, estimates the normals of scattered points with PCA method. Finally, the 3D surface of work piece is reconstructed using radial basis function interpolation.This system has the advantages of fast measurement speed, large measurement range and high degree automation.Because laser radar uses optical non-contact measurement mode, so there are no special requirements of the object surface.

Abstract: The seismic load usually has a significant hazard to the safety of the tower equipment, so it’s important to execute of seismic design in engineering practice. In this paper, the time history analysis of the seismic response is carried out with the help of ANSYS software for the finite element model of the adsorption tower. Relevant time history data is obtained. Compared with seismic analysis of the current standard method, corresponding suggestions are given.

Abstract: The design quality of auto steering hydraulic rotating valve directly affects driving security, operating stability and ride comfort. Active server page (ASP) technology is applied in the study of working principal of auto steering hydraulic valve, calculation method of web-based design and parameterization design for parts. An collaborative design platform in network environment is built. The collaborative design of auto hydraulic Steering valve based on network is realized through some key technologies of safety technology in network design, database technology, graphical viewing technology, and COM technology.

Abstract: An ergonomics optimization method of human-product contact surface design based on stochastic finite element was described. The shape of the contact surface between user and the product is the most complex content in product morphology design. Thinking of the individual needs of users, the stochastic finite element method was used to simulate the shape of product surface to meet the randomness of design variables, and the genetic algorithm was used to search the optimal surface solutions. And then a case of the seat back surface design of a driver chair was studied. The optimization results showed that the maximum pressure of the surface was decreased and the structure's reliability were guaranteed. The effectiveness of this ergonomics optimization method was verified.

Abstract: The muscle force and joint torque prediction model for intelligent human-assisted product design based on surface electromyography (EMG) was described. Muscle force and joint torque are the most important motion information in the intelligent assistant product design, and they can help designers to consider functional capabilities and limitations of different users when designing products. At first, thinking of the characteristics of daily tasks, surface EMG was adopted as the signal source. Secondly, the architecture of the prediction model based on the muscle physiological model and the musculoskeletal geometry model was proposed. According to the relationships of the “force-length” and “force-velocity”, the muscle force and joint torque could be calculated while the muscle active level was taken as one parameter. Finally, the experimental results of an intelligent stand-up assistant chair confirmed the effectiveness of the prediction model.

Abstract: The paper mainly introduces the methods of the designing of an intelligent lightning protection system, and its methods of lightning protection are different from conventional ones and are called plasma lightning protection and charge lightning protection. According to the physical process of effective lightning protection, it established the technical condition which the system should fulfill and achieve the purpose of its effective lightning protection.

Abstract: Functionally graded mold (FGM) is the trend in the development of modern mold. Based on the optimization of electroforming and arc spray forming, a functionally graded mold with the structure of Ni-NiAl-ZnAl-Zn was manufactured, and the microstructure of the mold shell was analyzed. The experiments show that the manufacturing of functionally graded mold by electroforming and arc spray forming is feasible in engineering. The research is of significant value in exploring new manufacturing technology of functionally graded mold.

Abstract: In this paper the Finite Element Method (FEM) is applied to verify the reliability of the steel ladle turret while the steel ladle capacity was extended. The three-dimensional model of the ladle turret parts were constructed with the 3D digital modeling technology. The models of main subassembly that need to be checked were digitally assembled imitatively. The key forcing parts were FEM Meshed and analyzed the stress and the displacement. The verify check results show that the coefficient of safety of the equipment is large enough for the ladle capacity raised from 300t to 320t without changing the structure of ladle turret. It can meet the strength requirement after the ladle capacity was extended. The digital assembled model of the equipment can also be used for further digital mechanism analysis.