Applied Mechanics and Materials Vols. 195-196

Abstract: The Computational Fluid Dynamics (CFD) model of the freon decomposition burner with bicyclo-inlet is established by using Eddy-Dissipation Model (EDM) chemical reaction model. The jet-flow turbulent diffusion burning and swirl-flow combustion are simulated to prove that the swirl-flow combustion can get shorter blaze. The strong vortex flow enlarges the high temperature region in the burner and the temperature is more uniform, which is conducive to the freon decomposition at a great heat.

Abstract: Developmental craniofacial deformity often has serious infection on the patient's chewing, language ability, swallowing, breathing and other related functions. Currently, internal and linear Distraction Osteogenesis (DO) are main surgery solutions of bone transportation and recovery in clinic. In this paper, we present a computer system called LinDOS for maxillofacial system reconstruction and visualization, maxillofacial tissues stress distribution analysis, as well as linear distraction osteogenesis simulation. Both design architecture and the function modules of the system are described in detail. The system can be employed as an assistant tool of maxillofacial preoperative planning and postoperative prediction for maxillofacial surgeons.

Abstract: For the multidisciplinary design optimization (MDO) question of autonomous rendezvous spacecraft, first, the analysis model and coupling relations of payload, propulsion and structure discipline are discussed; then the updated analytical target cascading (UATC) method is introduced and compared with the widely used collaborative optimization (CO). Results prove that the UATC method requires 54.8% fewer average subspace iterations than the CO and is more efficient for practical engineering MDO problem. Finally, based on the UATC method, a MDO problem of autonomous rendezvous spacecraft is solved and gets reasonable and effective results. The process proves the effectiveness of UATC method solving spacecraft MDO problem.

Abstract: Due to the discrete and incomplete sample data for the geological body in geological investigation, it is difficult to construct the three-dimensional model of geological body. Therefore, based on data interpolation, we propose a method to implement the three-dimensional implicit simulation for the geological body by programming with marching cubes algorithm. Firstly, the spatial interpolation method is used to predict the distribution trend of geological body and the three-dimensional spatial regular data field for the geological body is established. Secondly, the three-dimensional isosurface of geological body is extracted from discrete points by the marching cubes algorithm. Finally, combining with three-dimensional visualization technology of OpenGL, three-dimensional spatial morphology of geological body is simulated by tiny triangle approximation in computer graphics. Taken the borehole data in exploration engineering as example, this method is applied to develop the three-dimensional implicit simulation for ore body. The result of implicit simulation is close to the delineation of explicit simulation by human-computer interaction in three-dimensional geological modeling software. It shows that this method is feasible and efficient for the three-dimensional simulation of geological body.

Abstract: Transient electromagnetic pulse (EMP) can easily couple into the inner of targets via apertures. To calculate the EMP coupling effects on a cylinder object with openings, the coupling course is simulated using sub-gridding FDTD algorithm in this paper. Gauss pulse and double exponential pulse are selected as the incident pulse source. The coupling EM field strength E inside the object and the current density J on the surface are calculated. Several rules about EMP coupling effects are gotten both in time and frequency domain. The results can help us to understand the damage effects of transient EMP.

Abstract: Through analyzed the cleaning process of rear rolling type sweeper, the theoretical model of waste particle trajectory was established during the sweeper working process by using the contact theory of modern contact dynamics, and the ideal theory track of waste particle was simulated and optimized by using MATLAB. The three-dimensional solid model of the working device was created by using UG software, and virtual prototype model was completed by using ADAMS software, and rigid brush was replaced by neutral file with brush features characterize that was generated by finite element analysis software, and contact relationship of waste particle during the working process was added by ADAMS contact order, and rigid-flexible coupling virtual prototype system was completed and kinematics simulation was run. Finally, compared the trajectory curve from ADAMS simulation with the theoretical path from MATLAB, the Theoretical model was proved correctness. The theoretical research and simulation analysis was made test and verify each other. Facilitate the development of the same type of products.

Abstract: In this paper, a new kind of presentation model for software modeling and transformation is proposed, which is composed of three parts: static model, action model and presentation model. Presentation model describes user interface appearance thorough, while interface template describes the macro-layout and relation of interface, whose basic element is interactive object. Interface template-based presentation model can enhance the rationality of macro-layout of the interface, enhance the expressive power and control power, meet the requirement of auto generate high quality user interface. This solution can be used widely for suffering little from the domain and some special techniques of target applications.

Abstract: Calculation and simulation of the interior ballistic precedes the design of gun and charge construction. Modular charge system is the major development direction of large caliber howitzer, and will be as a replacement of current bag charge. It is necessary to develop a common program used to simulate interior ballistic environment of modular charge, which is a complex composite propellant charge. The characteristics of modular charge construction and the difference compared with traditional charge style were introduced at first. A simulation program of was developed based on lumped-parameters interior ballistic model using Matlab/Simulink development environment, which is relative simple, but, very suitable first stage design of interior ballistic of modular charge system. The program includes four modules, input parameters, core simulation code, calculation of form equations and data processing. The simulation results are agreeable with the experimental values according to the parameters of a certain 155mm gun. Furthermore, the program could be used in the numerical calculation of single charge or bag charge by adjusting some items.

Abstract: As the highest honor in the project quality aspect of the domestic construction industry, Luban Award has a strict appraisal condition and standard. When determining the plan of applying Luban Award, construction unit must design a set of perfect planning mentality and detailed implementation process plan. This article proposed one kind of planning and process workflow model to apply Luban Award, according to the appraisal request of applying Luban Award, Analyzed the nodes in each stage of a project, carried on the formal description to the project activity using the Petri net modeling method, established a mapping mechanism from each service to the workflow model, and analyzed the model reliability.

Abstract: With increasing social awareness on the issue of corporate social performance (CSP), the measurement of CSP has received considerable attention in both academic literature and managerial practice. Though earlier literature provides several methods for measuring corporate social activities, almost all of them have some limitations. In this paper, we propose a methodology for the development of a systematic measure of CSP based on fuzzy analytical hierarchy process (FAHP). In addition, a preliminary investigation is presented to explain how the approach can help in evaluating CSP in practice.