Materials Science Forum Vols. 697-698

Abstract: Movable power station is an emergency power supply (EPS) equipment. It consists mainly of a diesel generator and a noise reduction package. The noise reduction package has been designed by empirical methods traditionally, which usually leads to underdesign or overdesign. This paper aims to investigate the strength, stiffness and frequency characteristics of the package by finite element method, thus structural optimization scheme of the package is further obtained. The optimum package proved to be in good performance compared with the original structure.

Abstract: For the reliability problems of drilling rod of rotary drilling rig that need to be resolved currently, the paper took the friction-pressurized drilling rod for example, firstly analysised the failure modes of drilling rod with the joint method of FTA-FMECA; then established the structural reliability model of drilling rod according to the dominant failure modes respectively, and solved the failure probability; finally, made recommendations of reliability improvement. In the paper, the calculation of failure probability was done with Monte-Carlo simulation method, and the accurate solution was obtained with Matlab program.

Abstract: A practical and effective numerical method of reliability design with arbitrary distribution parameters is proposed in the paper. And techniques from the maximum entropy method, the reliability design theory and probabilistic engineering design are employed to present an approach for the reliability design with arbitrary distribution parameters. Therefore maximizing the entropy of the state equation distribution should lead to the least biased estimate of its form, which helps us analyze the reliability design of automobile components from an elementarily.

Abstract: Sprocket has an important role in improving the transport performance and life of the armoured face conveyor, which is the key component in the transmission system of armoured face conveyor (AFC). In this paper, true stress-true strain curves of materials of the sprocket and the ring chain are obtained by computing the data of static tensile test. A simplified symmetric finite element contact model is established based on the nonlinear finite element software ABAQUS. Stress field and torsional stiffness coefficient of the sprocket are calculated according to loads and boundary conditions. Simulation results are in good accordance with the test results. The finite element model and the simulation results provide useful guidance for design and test of the sprocket. Meanwhile, accurate torsional stiffness coefficient of the sprocket is obtained for simulation of the transmission system of AFC.

Abstract: Emotions are the important factors affecting design. The instant exquisite self-demand resulted from being emotional can provide creative sources for design, and it is the catalyst of the creativity. The designers often neglect their most basic emotional creativity. This paper analyzes the effect of emotions in design based on cultural emotions and individual emotions, and proposes reasonable advices for emotional management in design process.

Abstract: With the recent years, the rise of cottage, as a projection of the different forces, takes advantage of the current main market of electronic products in China with the characteristics of strong imitation, rapid production and civilian population, moreover,it shows a low-input high return phenomenon.Cottage that mainly actives in the Guangdong area has the trend to expand inland, it does not have their own brand, and mainly imitates the well-known brands of electronic products to thrive.It stimulus the design from the negative aspect,and wants to reverse the design of stagnation with distorted position.Its' rise means that China is undergoing a qualitative change in the design and further affecting the development of the design industry,which would lead the design into a new industry.

Abstract: This article mainly describes the development of Chinese design culture and the impact of culture in Germany, Italy and Scandinavian countries on industrial design. Then it analyzes differences from perception of nature, value, thinking mode and aesthetic point between China and the West. It compares the difference of industrial design in different countries and impact of different cultures on industrial design. It systematically studies the relationship between culture and industrial design. The key point in design is use of culture. The innovative point in this article is to apply the cultural elements to industrial design. In design, the combination of cultural elements and products should be natural and proper. The cultural elements and products should have something in common. People should not superficially impose cultural symbols on the appearance of product.

Abstract: Based on the theory of gear mesh, the contact line equation of involute offset cylindrical worm gearing, which is consisted of an involute helical gear with few teeth and a face gear in substance, is obtained. Furthermore, in order to investigate the influence of design parameters on the performance of contact line, numerical simulation of which is carried out. Analysis results indicate that an appropriate increase in helix angle and modulus as well as the teeth number of worm, reduction in the teeth number of worm gear can make the contact line performance better.

Abstract: To realize smooth manufacture of product with complex surface, a new algorithm, design for quality control (DQC), strongly connects design model and machining model. Geometry information in popular STL file in design industry was fast obtained and then exactly input into a grid-meshing model. For meeting precision requirement of machining model, quality-control parameter was employed to control subdivision times and the result-surface machining quality. Then the designed features of aesthetics surface or functional surface were kept in smooth manufacture with optimum quality. By self developed software for DQC in Visual C++, stability and reliability of this algorithm were proved.

Abstract: Stability is the key of designing thin-walled external-pressure Vessels. Nonlinear buckling analysis using finite element method has been carried out on a processor unit of an autonomous underwater vehicle to study the stability of the processor unit considering the screw tightening. Effects of the cylinder thickness on the critical pressure are discussed. Results show that the buckling wave number is 4 in the circumferential direction, and the critical pressure decreases with decreasing the cylinder thickness exponentially, which is in good agreement with the theoretical calculation.