Applied Mechanics and Materials Vol. 620

Abstract: The continuity characteristics of spiral space is extremely suitable for function of exhibition buildings. Under the background of rapid development of technology and information, the forms of spiral spaces are becoming more sophisticated and creative. In this paper, we introduce the concept of “topology” and set the latest and most classic cases of spiral space form in Exhibition building, and make a meta-analysis of the idea of spiral space of exhibition buildings in two ways which are geometric topology and natural bionic, and aiming to study the homogeneity feature of the form.

Abstract: Contrapose the disadvantages of the traditional fire water branch stents, the paper developed a simple structure, safe and reliable, low labor intensity, and can adapt to the complex fire environment of portable fire water branch stents.This paper introduces the structure and working principle of fire water branch stents, and simulates analysis of the motion trajectory of fire water branch through the Pro/E and ADAMS.The results show that the portable fire water branch stents safe and reliable, can meet the demand of fire control.

Abstract: The purpose of this paper was to verify the way in which CAD systems and their tools for visual surfaces analysis interact with morphological knowledge in the determination of continuity in product design procession. Geometrical knowledge is necessary but not enough for working with this attribute of form in everyday objects, where cultural factors are involved. Geometry establishes a progressive range of surface continuity that involves the concepts of position, tangency and curvature. In product design different degrees of continuity that not necessarily follow this idea of increment. What is understood as discontinuous in products in most cases is geometrically continuous.

Abstract: This study presents a 3-D model reconstruction method using a multiple coordinate measurement machine that includes a touch-trigger probe and image detection. Control points of the feature curves of an existing shaped part and geometric data of engineering features are first measured, and then the 3-D model is reconstructed in forward design procedure by the common CAD software ‘Pro/E’. This study also develops finite element models based on the 3-D model built to conduct mold flow simulations by the simulating system ‘Moldflow’. A joystick with two cases was adopted as the illustrated case. Final, actual rapid prototyping (RP) models were fabricated for model examination.

Abstract: As an important part of the structure of hydroelectric power station, surge shaft is embedded in the rock mass, whose body size and loading conditions are typically complex. Thus, it is necessary to evaluate safety of the design scheme in order to ensure construction safety. With upper background, three dimensional finite difference model of the surge shaft and surrounding rock of a hydroelectric project in Zambia were established based on three dimensional nonlinear finite difference analysis method. Calculation of the surge shaft stepped excavation with supporting at all levels of the construction process was done. The deformation and stress state of the surrounding rock of surge shaft and its variation law in excavation process was analyzed. Furthermore, the stability of surrounding rocks and rationality of the designed support measures were evaluated.

Abstract: The singular configurations of a type of redundantly actuated parallel manipulator are studied in view of manipulability. Considering the non-square characteristics of Jacobian matrix of redundant input parallel machine, Laplace Theorem and its correlative theorems in Matrices Theory are introduced to avoid the problem that there is no determinant for non-square matrix. Singularity configuration distribution characteristics of this redundant input parallel machine are also depicted for different surfaces and orientations. These results provide pivotal foundations for its valid workspace selection.

Abstract: This paper studies a two-machine flowshop problem with release dates, rejection and non-availability interval on the first machine. The non-availability interval often origins from equipments maintain or man-power. Usually, in order to pursue maximal profit, some jobs which can be rejected, and in this situation the rejection penalty should be paid. Our objective is to minimize the sum of the makespan of the accepted jobs and the total rejection penalty of the rejected jobs. For this demonstrated NP-hard in strong sense, we propose a heuristic method and further demonstrate that its worst case performance is 3.

Abstract: In order to analyze the influence of structure parameter of air-suction roller-type precision metering device on the flow velocity and pressure, the flow field was calculation and simulation. Take the compressibility and the viscosity of the real gas into account, the N-S equations, RNG k-ε turbulence model and wall function were applied to measure the flow rate and pressure of the outlet under the conditions of changing the area of the suction holes and the diameter of shaft. The results revealed that compared with the shaft holes area, the diameter of center axis have a marked influence on the flow velocity and pressure of outlet. When the area of suction holes is constant, with the increase of shaft diameter, the outlet velocity increased and pressure decreased; when the diameter of axle is constant, with the shaft holes area increase, the outlet velocity increased and pressure decreased.

Abstract: Vibration chassis is the point parts of vertical horizontal circular vibration drier, the paper used UG software to conduct parametric design. The paper established parts template, parts library and UG style menu of the vibration chassis. The paper also used UG further development module and the corresponding C++ program in Visual C++ development environment to control and transmit the parameters. The paper established parametric design based on the combination of the two factors. When the users input parameters, they could get more complete design project after a short time of operation in this designing software. The software could reduce or even avoid a large number of manual tedious and boring modification processes. It also could reduce calculation and workload for the designer and has higher practical application value.

Abstract: This paper concentrates on the development of instructional design integrated with Quality Function Deployment (QFD) and TRIZ40 principles model. This paper draws from the research study which aimed to investigate the development of instructional design integrated with QFD and TRIZ40 principles model for the Design Education Program in the Faculty of Industrial Education at King Mongkut’s institute of Technology Ladkrabang, Bangkok, Thailand. The research methodology was a mix methods. The sample groups were composed of 5 lecturers and 100 Undergraduate students of the Design Education Program. The research methods were questionnaires and focus group technique. The statistics used were frequency, percentage, arithmetic means, and standard deviation. The research found that there are 3 steps of instructional design development integrated with QFD and TRIZ40 principles model. The first step was a learning and acceptation process. The second was to develop the instructional design, which was integrated with QFD and TRIZ40 principles model for the Design Education courses. The last step was evaluation on students’ learning and satisfaction. Based on evaluation of the instructional design experts, the instructional design, which was integrated with QFD and TRIZ40 principles model was highly appropriate for undergraduate students in the Design Education Program. This study reviewed that lecturers and students’ satisfaction with the instructional design integrated with QFD and TRIZ40 were also high because it was easy to utilize. Moreover, it was very effective to evaluate their progress throughout their learning process. Undergraduate students learn with Model of Instructional Design integrated with QFD and TRIZ40 principles for Design Education in Undergraduate Study Level. Have higher achievement scores than Learning in normal/regular classroom with a statistical significance level of 0.05.