Advanced Materials Research Vol. 853

Abstract: In this paper, we study the problem of how to allocate capacity for multi-generational products when a manufacture makes production decision. We establish a capacity allocation model for three generations of products and obtain the optimal allocation strategy by incremental decision tree analysis. Through the numerical experiment and parameter sensitivity analysis, we analyze the influence of products price, cost and salvage on the decision results. We also provide management implications for manufactures using decision-making tools to improve revenue.

Abstract: The objective of the powertrain mount design is to find the geometry which meets the desired stiffness and damping requirements. For the conventional rubber mount, which is composed of a rubber element bonded into a metal bracket, its stiffness can be predicted using FEA but the damping is evaluated by physical testing. This paper introduces a design method at which the damping coefficient of the rubber mount is to be predicted theoretically based on the assumption that the phase angle for a rubber compound is constant. Absence of physical test in this proposed new design process, the development time from concept to production is reduced.

Abstract: The accuracy of convergence at the solution of a problem of determination of margin of safety of the rivet composition is operating in the conditions of action of stretching and momentary loading in the plane, the perpendicular plane of composition was investigated. The problem is solved by classical methods and also by method of final elements in the software complex Ansys 12. Difference in specific values of the margin of safety of load on each point of fastener between the theoretical calculations and calculation in the Ansys ystem was from 324,7 to 926,3 percent. Accounting fastener pull reduced the margins of safety by 84,1 percent.

Abstract: In order to study the nonlinear viscoelasticity of polymer melts at high shear rate, multi-function and all-electric rheometer (MAR) was designed by the authors. Development of temperature control system of MAR is important because rheological behavior of polymer melts is affected by temperature significantly. The design principle of the temperature control system of MAR was studied. According to the temperature upper limit the barrel need to reach, and the power the heating system can offer to maintain the temperature, the suitable type of heating system was determined. Considering the requirement of heater and the measurement error, the suitable type of temperature transducer was determined. The measured values of temperature were compared with the set values of them to evaluate the temperature control error of MAR. The results show that the temperature fluctuation is smaller than ±0.4°C in 3.5 minute. Therefore, the temperature control error of MAR is small enough for rheological test. And the temperature control stability of MAR is very well.

Abstract: Multi-function and all-electric rheometer (MAR) was designed by the authors to study the nonlinear viscoelasticity of polymer melts at high shear rate. It is important to design suitable size of capillary and barrel because it is the calculation basis for some other important parts and determines the shear rate range of MAR. Considering the shear rate range, the entrance pressure correction and the wall slip correction, the length and diameter of capillary and barrel of MAR were designed through particular analysis and precise calculation.

Abstract: This paper made an assumption which considered the structure of tower crane as truss structure and equated the complex spatial structure of tower body under multi-loads to single planar truss structure. The calculation model of internal force of rods was built. The calculation formulas of four types of trellis tower mast configuration commonly used were derived. The result based on the real project given by the calculation formulas agreed with the result given by the finite element software. These explicitly expressed formulas were simple and easy to calculate by hand. An accurate and efficient method to calculate internal force of rods of tower crane was provided.

Abstract: In recent years, excessive expansion of the PV industry makes photovoltaic products in oversupply condition, coupled with anti-dumping investigation of the United States and Europe, china PV industry fall into the bankruptcy plight. In order to stimulate the development of domestic PV application market in a short time, China has introduced a number of PV support policies; however, compared with Germany in policy design, China's PV support policy system is too rough, Apart from a number of demonstration projects, PV application market is far not formed. Therefore, the PV support policies require a more detailed design. This paper aims to discuss the current related problems of china PV support policy based the NPV model, than propose countermeasures and suggestions. This paper argues that the government needs to develop NPV model-related implementation details for different types of participants. The government should attach importance to the development of small household systems (SHS).

Abstract: Twin-rotor cylinder-embedded piston engine are a high power density and no valve mechanism engine. Given the motion law of two rotors sine curve change, its kinematic model of rod can be established, and key parameters of rod related to engine performance, such as angular displacement, velocity and acceleration of rod are presented. And then the kinematic model of rod is imported into MATLAB, the moving law of angular displacement, velocity and acceleration of rod are analyzed by changing the value of swing amplitude k. It can be concluded that the changes of rods motion are periodic, relatively gentle, and the periodic of angular displacement, velocity and acceleration of rod are the same. For different value of k, the fluctuation of velocity and acceleration of rod are in direct proportion to k and angular displacement of rod is fixed.

Abstract: The fatigue problem of structures under concurrent thermal and vibration loading has not been thoroughly studied even though it is common in applications of aero-engine combustor liners. Here we attempt to explore such a problem using a simplified combustor liner model that is implemented by the commercial finite element software ANSYS Workbench. The modal parameters at various temperatures are calculated and the fatigue behavior under stochastic base excitation and thermal environment are analyzed. The results show that thermal loading not only has an effect on dynamic characteristics but also reduces the vibration fatigue life of the structure.

Abstract: Innovative design refers to give full play to the designer's creativity, using humans existing science and technology achievements (the theory, method and technology principle, etc) to find innovative ideas, and design a scientific, creative, novelty and practicable product. With the rapid development of modern knowledge in many industries, having higher market occupancy also becomes more and more difficult. So it requires immediate talent team having enough innovative ability and innovative ideas. [1, Innovative design methodology, the objects of this research, makes the engineering design divided into four processes that are Object Design, Conceptual Design, Parameter Design and Optimal Design. In the process of designing new products, a substantial amount of professional knowledge, and reasonable selection of the knowledge which is mastered, using the knowledge, getting more familiar with the four innovative processes are all very important to innovative design and also the development of new products. And here, in the process of Sports Equipment Design, this design methodology can make the designers more inspired and having a more distinct thought.