Advanced Materials Research Vols. 479-481

Abstract: Non-Dimensional Design Method (NDDM) for pressure vessels may simplify the design process, reduce the human resource, and it can substitute for the traditional method. The principles and steps of the NDDM were presented. In the method, we constructed two kinds of non-dimension parameters through introducing referenced dimension and pressure. Non-dimensional data of the opening reinforcement structure of pressure vessels were attained. In order to validate the results, two pressure vessels with same structure and different computing pressure and size were designed. The correctness was checked by the present standards. It showed that the NDDM could be applied briefly and reliable.

Abstract: In view of the problems of large stress and severe bearing heating in double-drum winch at present, this paper adopted a new method to enhance bearing capacity for double-drum winch by adding anti-pressure wheels between two drums. Finite element methods were used to analyze the strength of 4000kN-traction double-drum winches with anti-pressure wheels and without anti-pressure wheels respectively. The results of the analysis revealed that the stress of the cylinder bearing decreased from 264MPa to 167MPa. The new method by adding anti-pressure wheels had remarkably improved the endurance of the bearing. Therefore, the design method can be widely used in large-traction double-drum winch.

Abstract: Modularity has been recognized as a vital factor to implement mass customization. To obtain the optimization project of modular design, Customer's Requirements must be gained firstly. There has relation between each Customer's Requirement. So, the gain technology of Customer's Requirements degree, which using investigate questionnaire, is expatiated in this paper. Then, the gray relation degrees between customer's requirements can be gained by gray correlation analysis. A questionnaire, which using the household hanging air-conditioning system as an example, is proposed in this paper. The result, which using gray system theory to analyze, demonstrates the feasibility of the proposed approaches.

Abstract: Logistics outsourcing as a form of outsourcing, are increasingly welcomed by the enterprises in developed countries, which has become the strategic orientation of many enterprise logistics mode. However, the development of business logistics outsourcing in China is far from that in developed countries, mechanism factors restricting the development of business logistics outsourcing of China has its characteristic, for this, this article analyses the advantages and risks of logistics outsourcing, and proposed prevention countermeasures of enterprise logistics outsourcing in China.

Abstract: The modular design offers insurement for effective development of serial and diversify products, and hence to satisfy the demand of the market. Through researching the modular design in function and structure, the process schem of modular design characterizing anchor and windlass products was proposed. By studying the module partition method of function and structure, the anchor and windlass was classified as modules of power, modules of driving and changing, modules of control, modules of performing. Based on the program language and three-dimensional software, the computer-aided modular design system for anchor and windlass was established, which satisfies the parametric design for anchor and windlass.

Abstract: A customer requirements driving NPD method is addressed. This study proposes a new method to elicit customers’ requirement, through which NPD team acquire product attributes and quality functional deployment. Customer requirements driving New Product Development Method addressed in this paper is based on integrated application of customer requirements elicitation, CAD, CAM, CAE technology. It makes STP strategy of NPD become more quickly and more effectively compared with the traditional method. This study finds that precise customer requirement elicitation contribute to NPD’ success, a better NPD performance can be achieved by customer requirements driving NPD method (CRDNPD). A case study of All Terrain Vehicle NDP is used to illustrate the new method. We believe that the proposed methodology will have a positive impact on the future new product development.

Abstract: Magnetic chitosan bonded β-cyclodextrin polymer was prepared, and its metal ion binding was studied using the batch static tests for thallium removal. The results indicated that magnetic chitosan-β-cyclodextrin polymer (MCS-CD) showed a high efficiency for the removal of thallium, the experiment data fitted well to the pseudo second-order kinetic model, the maximum adsorption capacity of 2.154mgg-1 was obtained according to the isothermal data.

Abstract: At first according to several typical definitions this paper concludes the characteristics of the module, based on which the descriptive model of the module of mechanical product and the concept of the module family are proposed, and then the configurative model of the module family of the mechanical product is discussed, so is the modular design of mechanical products based on the module family. Finally, three methods of the modular design of mechanical products are summarized.

Abstract: The evaluation of conceptual design schemes of mechanical products is an essential problem in the process of its conceptual design. At the stage of conceptual design, whether a correct and objective evaluation can be made on these design schemes will ultimately decide a good or bad performance, even its success or failure. The evaluation of conceptual design is a semi-structural decision-making that includes qualitative indexes and quantitative indexes, so it is difficult to select the best design concepts from a number of schemes. Therefore, an evaluation model based on the engineering fuzzy set theory is developed in this paper. First, the paper makes a detailed hierarchy analysis of evaluation indexes system and constructs some evaluation units according to evaluation indexes system. The whole evaluation of schemes is translated into a series of evaluation of basic units or comprehensive cells. Second, a multi-pole fuzzy pattern recognition model based on the engineering fuzzy set theory is established and the relative membership degree matrix can be obtained by the model, the matrix shows the order of excellence. An example is given for demonstration of its application. It shows that the method is feasible and reasonable.

Abstract: As designing the loader working device related to multi-variables, multi-objective and it is a non-linear constrained complex optimization problem essentially so using traditional optimization method to design the loader working device is low efficiency. A new method is proposed which combines the sensitivity analysis with the genetic algorithms to reduce the design variables and to improve the optimization efficiency. The optimization mathematical model is established. The key design variables which have greater impact on the loader digging force can be obtained by the sensitivity analysis and then input into genetic algorithms to conduct an optimization. By using this method the result showed that the loader digging force can be increased by 5.9 percent on the premise of meeting the overall performance requirements of the loader.