Advanced Materials Research Vols. 308-310

Abstract: The electrical characteristics of an interconnection system, which include impedance, insertion loss, and return loss, can greatly affect its performance as the signal speed increases. The objective of this research was to understand the discrepancy between the computer-aided analysis and measurement results of an interconnection system, so that a more accurate prediction of the electrical characteristics of this system can be made during the design phase. It was discovered that in both the time and frequency domain the computer-aided analysis results were consistent with the measurement results. Given these conclusions the simulation model was modified to improve the impedance mismatch within the interconnection system. It was found that by properly designing the antipad, the impedance mismatch can be greatly reduced.

Abstract: This article study something about establishing virtual prototype of axial piston pump based on the type of Vikers PVH98. Use ADAMS software to establish mechanism model and AMESim software to build hydraulic control system model respectively. Simulate the dynamic characteristics of the pump via coupling two models above-mentioned. Because of its clear in physical concept and easy change for parameters, the simulation based on virtual prototype is more convenient for studying the characteristics of piston pump.

Abstract: The best is to read these instructions and follow the outline of this text. n this investigation, laboratory permeability tests were conducted on the wet-processing reinforcement specimens to study the feasibility of reinforced soil as a material of construction. Two kinds of reinforced specimens with different reinforcement materials (wheat straw (C) and flax (M)) were mixed with 3% contents of soil mass, and product to the cylindroid for measurement of permeability by a flexible-wall permeameter. The variation relationship between permeability coefficient and Na2SO4 concentrations was analyzed. Test results show that the liquidity reduced with incrassate diffusion layer caused by the increasing Na+ concentrations in the diffusion layer of soil particles, and then a decrease of permeability is found. With the increasing time of permeability, it is found that the permeability coefficient decreased due to the consolidation and decreasing porosity of specimens caused by the change of stress state. At the same time, ion exchange adsorption and water film incrassate occurs in soil particle surface which also benefit to the decrease of permeability coefficient.

Abstract: Many scholars have developed a lot of flexible modules used on Hydraulic press, but to reduce costs such as the producing cost and the transportation cost, the above modules, formed through continuation, should be optimized before put into the module library. This paper introduces a method which optimizes the continuation body of type YH30 by means of LSRM. And the contrast shows the new nodule has a well effect on optimizing structure and reducing costs and materials.

Abstract: The paper first put CAD/CAE technology into the domain of hydraulic excavator research and exploitation. It was focused on the analysis of excavator working equipment with this technology. In the paper, mock-up solid model of excavator working equipment was established with Pro/ENGINEER software, the kinematics and the dynamics of the model was analyzed with ADAMS software and then the intensity analysis and structure optimization were done with ANSYS software. The conjoint analysis and simulation not only give full play to these three software's advantages, but also realize data sharing and enhance efficiency and precision of the analysis.

Abstract: In order to research the cooling performance of engine water jacket, the CFD method and the software Fluent were used to analyze and optimize the capability. After building and meshing the three-dimensional jacket model, the coolant flow distribution and heat transfer coefficient distribution in jacket were obtained by simulating, and the deviation between simulation results and experimental data dose not exceed 5.3%. The current imbalance problem of heat transfer in water jacket was studied, and an optimization scheme was proposed according to the analysis of flow distribution in each cylinder water hole. The result of optimization program analysis and comparison indicates that the water jacket cooling performance has been significantly increased, the overall structure of water jacket is more reasonable, and these make engine get better cooling.

Abstract: According to the significance of the contact between mechanical surfaces and the deficiency of the study at present, the finite element analysis software—ANSYS and APDL tool are used to set up a microcosmic contact model due to the micron scale surface topography data of the parts measured by the laser measurement equipment named OLYMPUS, and simulate the complete contact process of rough surfaces based on the theory of elastic-plastic transmutation. A solving algorithm of gird meshing based on multi load steps for the problems of grid precision and grid distortion is presented during microcosmic contact process. Through the disposal module /POST1, the relations between the real contact area, the load and stress are given, which offers the foundation for the analysis of contact mechanism and connect capability between mechanical joint surfaces.

Abstract: In view of the issues of computational method combined execution that need parameters transfer in the process of complex product engineering analysis, the execution principle and parameter file formats of computational method are discussed. Through parsed the computational parameters, the mapping relationship among multi-computational methods are established and parameters passing between computational methods is realized. A product design analysis environment system, called PDAE, is developed. With the application of PDAE in the analysis process for CFB boiler and turbo-generator, the feasibility and validity of the approach proposed is demonstrated.

Abstract: The thermal control indicators CAE methods of Space optical remote sensor are analyzed in the presented work. We sat up a thermal optical analysis model for space optical remote sensor. By assuming fully covered by in-orbit temperature load, and using the finite element method for thermal deformation analysis, we obtained the optical remote sensor surface deformation and displacement under various thermal loading. Using ZERNIKE polynomial, wave was fitted to obtain ZERNIKE polynomial coefficients which were incorporated into the optical system design. Using CODE V optical calculation software, heat-ray machines under elastic deformation of the system point spread function, transfer function (MTF), wave front differential (WFE) etc. were calculated. Image quality changes of remote sensors are discussed in variety assumed cases such as temperature loads of quality change. By repeated iteration, critical value of temperature fields meeting the design requirements are obtained for the optical system. Optical indicators were converged to the temperature field indicator, then reasonable indicators of thermal control for remote sensors were obtained. For the thermal control design, this method provided a reliable basis for design.

Abstract: The entity model of the combining vibrating screen was built and leaded into the multi-rigidbody dynamics software called Adams. Its kinematical simulation and analysis were done, and displacement graphs and velocity graphs of the movement of the mass center were obtained. The movement laws of the combining vibrating screen were revealed. All the researches were done to provide theories to design combining vibrating screens.