Applied Mechanics and Materials Vols. 71-78

Abstract: Capillary tube, a efficient and energy conservation heat exchanger, has been widely used abroad. In china, the research of air-condition terminal based on capillary tube is focus on the planar radiation at the moment. But kinds of problems such as moisture condensation happen because of the different climate of China. So we put forward developing a kind of breathing air-condition cabinet combined with heat exchange and dehumidification, and do some calculation about major parameter. We will do in-depth study on cabinet's flow field so that it can be high-efficiency.

Abstract: The climatic and geographic characteristics in the Yunnan basin are introduced and characteristics of precipitation，runof and silting in the river basin are analyzed．The regulation of rainstorm and flood within the river basin is analyze according to the statistic data of previous rainstorm and flood.

Abstract: The paper summarized and thought problems existing in construction of the urban garden landscape, and analyzed the applicable advantages, technical characteristics and implementation plans of green materials and the renewable energy in the construction of the urban garden landscape. That guided by Evaluation Standard for Green Building and ecological theory, with a view to have implication for the construction of the urban garden landscape.

Abstract: This paper designs the physical model as geological conditions of XinZhi mine 2204 face of Huozhou Bureau of Mines in Shanxi province, it simulates the formation process and distribution of the mining rock fracture using simulation experiment of similar material, and researches the evolvement law of rock’s fracture network in caving zone, fractured zone using fractal geometry theory. The conclusion of the experiment indicates: with the advance of the working surface, the rock fracture develops from bottom to top, the different fracture network forms corresponds to the different push distance of the working surface, the latter network piles up the previous network, mining makes more complex distribution of rock fractures. The amount of overlying strata separation is three-stage separation law of development, including Initiating phase separation, Expansion phase separation and closed phase separation. Critical layer to any point along the separation experienced by the small → large → small and stable process of change. At the same time, the fractal dimension of the mining rock fracture goes through small to large, under the identical mining width, the fractal dimension of fractured zone is caving zone of 80% to 90%, at last, when the mining work is finished, the fractal dimension dropped to a more stable value.

Abstract: Today’s industrial design has gone beyond the traditional product design. China is in the transfer process from the world's manufacturing plant to the world's manufacturing center. Green design is the basis of access to green products, and has become one of the hot researches in design areas. The results show that the design phase determines the 70% to 80% of manufacturing cost, while the design itself accounts for only 10% of the total cost. The importance of the roll of design to product is still increasing if considering the environmental factors. Because the level of ecological damage caused by the product design is far greater than the level of ecological damage caused by the design process itself, only in the design stage should the "green level" of products be taken as a design target, the desired design result could be achieved, which is one of the goal of ergonomics. In today's information society, the graphic communications industry is charged with an irreplaceable task of information manufacture and dissemination. A variety of devices (including electronic, optical, mechanical equipment and instruments, and even household facilities and equipment, etc.) used by the modern graphic communications industry need the direct contact, operation or use of the operator. Design and manufacture of these devices need to apply modern ergonomic design theory and research results. In this paper, the importance of ergonomics, the features and research aspects of green design, developing trends of ergonomics, and the application of ergonomics in the graphic communications industry are described.

Abstract: In order to improve long-term durability of bioprosthetic heart valve, we take the spherical,paraboloidal,cylindrical and the ellipsoidal leaflets for nonlinear analysis and the material is orthotropic.The experimental results of the finite element nonlinear analysis show that when the leaflets with the material orthotropic is closed,the deformation of the symmetric edge is larger than else. The stress distribution of the cylindrical, spherical, paraboloidal and ellipsoidal valve leaflets is quite different. The ellipsoidal valve leaflets have more advantages than the cylindrical, spherical, paraboloidal valve leaflets.This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.

Abstract: Universal-rod steel-shuttering jumbo (URSSJ), as a key construction equipment for tailrace tunnel lining of underground plant in Pubugou hydropower station, has a good reusability in structure but must satisfy the requirements of intensity, rigidity and supporting stability. Due to complicated working conditions of the URSSJ, it is difficult to calculate stress and strain of the URSSJ based on traditional design method. In this paper, finite element technology is introduced into the analysis of the URSSJ. The approach of this work includes steps of (1) analyzing the structure, working conditions and load characteristics of the URSSJ, (2) modeling the hinge system by meshing, loading and boundary constraints, and (3) computing stress and strain of its major components under the most dangerous condition. The results verify design feasibility and structural reliability of the URSSJ.

Abstract: The development of economic has cause many problems about emerging and dense concentration of High-rise buildings in Baotou,so that the urban natural environment, urban living environment, urban spatial structure ,the urban cultural environment have been greatly affected.Therefore, this article discusses the problem about high-rise buildings from the perspective of the urban environment, with an aim to find a harmonious development method on high-rise buildings and urban environment.

Abstract: Cement paste and concrete with different molecular weight of side-chain of polycarboxylic acid type water reducer (PC) and retarder has been researched. In this way, the method of adjusting the molecular weight of side-chain and complexing retarder to hold fluidity has been discussed. The results show that with increase molecular weight of side-chain, the dispersibility and holding dispersibility increases. With retarder and PC, the dispersibility and holding dispersibility of PC with big more molecular weight of side-chain increases and the loss of fluidity at 1h prominence reduces. But it relates to breed of cement. Especially at low ratio of water and cement, when molecular weight of side-chain is more than 2000, complexing PC and retarder can improve the fluidity and holding fluidity.

Abstract: In this paper, a geotechnical finite element software PLAXIS is used for the nonlinear finite element analysis of elastic long pile under the horizontal force action. By using the calculated maximum bending moment and the maximum displacement at the ground, and combined with the related formula for “m” method given in《 Code for Pile Foundation of Harbour Engineering》, a more accurate m value can be obtained conveniently. Based on this method and by the single factor analysis, a more systematic study was made to the related factors,and obtained the influence law of various factors to m value.