Advanced Materials Research Vols. 538-541

Abstract: The development of intelligent design manufacturing based on the three dimensional environment of knowledge engineering is the important research content. This paper set MBD procedure model as a process of design and the basic of optimization, establishing basic process said and evaluation method according to space product manufacturing characteristic. With Model based definition, the key equipment information of aerospace products manufacturing is the starting data of the process of optimization, and realize the space cable equipment a process design and optimization process, product process for space design and optimization provided based on full 3D model of application methods, established the process design of the application, the actual proof, design and optimization combined with MBD procedure model is the important guarantee of process design.

Abstract: The amplitude transformer is widely applied in ultrasonic machining because it can magnify the amplitude between the ultrasonic transducer and the tool. This paper explained the experimental device of the ultrasonic vibration system, the design principles of the amplitude transformer and the design process of the conical transformer. At last, it gave the engineering drawing of the amplitude transformer.

Abstract: In this paper, design problems on rotating cone reactor have been studied and dynamics problems have been analyzed in detail, kinematics differential equation of mixture in rotating cone reactor and simulation model has been established. Rotating cone reactor prototype which was established preliminarily has been optimized with simulation software. Dynamics analysis and simulation is of great significance in raising the efficiency of BIO-FUEL-OIL flash pyrolysis rotating cone reactor, control production process reliably, and even optimizing design value and physical dimension which is reasonable in design and reducing the cost of product development process.

Abstract: It is commonly accepted that absolute immunity from flood damage is not physically possible even in the distant future because of unpredictability of several natural forces which might cause unprecedented situation. Even so, with proper planning and continuous effort we can certainly look forward to an appreciable diminution of distress with an accelerated implementation of flood management measures. It is commonly accepted that the measures to mitigate flood losses need to be given the most efforts wherein flood damage assessment is the primary measure of mitigation. This has been viewed mainly as a physical method of protection from floods. To make the measures to mitigate flood losses, it first needs to effectively measure the flood influence in which flooded area and height may be the most desired measures for each of typhoon-induced flood events. On the other hand, sophisticated hydraulic modeling tools are now available to help us estimate the scale of we face from typhoon-induced flooding from a computational perspective. The flood scale in terms of area and height of typhoon-induced flood events may be the major contribution to feedback for the calibration of those sophisticated hydraulic modeling tools. Thus, a flood mark recording device is highly required to be re-examined for its use in such an increasing demand. It’s commonly accepted that a new generation of device should put economic, environmental, simple and practical considerations into its design concept. This becomes the main purpose of this study to modify an old-fashioned stream gauge to a better device, named as Double-Tube Flood Mark (DTFM) stream gauge. A number of DTFM stream gauges were installed in the low-lying plains to experience floods for recording their flood heights as a measure of flooded areas. For a comparative purpose, we set up the electronic stream gauges of the stilling well, which measured the height of a float in a hole dug alongside a stream channel. In addition, we also used other types of stream gauge include the pressure transducer, which inferred the depth of water in a stilling well by measuring the pressure of the column of water inside. The gage height values, taken at regular intervals, were recorded by depending on the technology--transmitted electronically to the dedicated databases. The verification showed a satisfactory result as expected. As a general conclusion, the field installment of a DTFM steam gauge is easy and fast. In the mean time, the cheap cost largely increases its placement at all kinds of possible locations to provide high accuracy of flood measures for the calibration of sophisticated hydraulic modeling.

Abstract: This paper does some researches on flow and noise of one exhaust muffler, in order to make its comprehensive performance better. In the process, a simulation model of gasoline engine and a muffler comprehensive evaluation system are established. Simulation computation shows that the best optimization scheme improves muffler’s comprehensive performance by 12.5%, proving this evaluation system has theoretical significance and engineering practical value.

Abstract: In this study, an occupant restraint system model of a production SUV developed in MADYMO software was used for crash simulations. Component tests were conducted to obtain the parameters of seatbelt and seat. Parameters of airbag were obtained by tank tests and the airbag model was validated by headform drop tests. The occupant restraint system model was validated against results from real vehicle crash tests. Robust design method was adopted for sensitivity analysis and system optimization. Two parameters, spool effect of the seatbelt and mass flow of the airbag, were studied to improve the occupant protection. Better protection performance has been obtained using optimized parameters, and the robustness of the optimized result was proved by robustness assessment.

Abstract: Interventional variant design and its supporting technology are proposed. It was discussed how to establish variant design correlative model and operate node of variant design correlative model. A prototype system was given that support the interventional variant design pattern.

Abstract: In order to improve the human engineering properties for the racing wheelchair, using the CATIA Human Engineering Analysis module, this paper established the human body 3-D model, analyzed the eligibility of the hold and the extend for the racing wheelchair, analyzed and evaluated the comfort of three typical sports postures of human body. The general evaluation results accorded with the human body kinematic theory, and the upper limb comfort gradually became better, in a movement cycle of the upper limbs driving the wheelchair.

Abstract: In this paper, we use the virtual prototype technology in combination with fatigue life analysis software to analyze the fatigue life of the basketball wheelchair. Through the analysis, we judged the weakest links which influences the fatigue life in the wheelchair structural design. Research results have the vital significance for improving the performance of the basketball wheelchair and the development level of sports.

Abstract: Product Maturity Level (PML) has a great significance as an important tool in impelling the development of professional product research and realizing optimization of supply and product continuous improvement. Through analyzing Product Maturity Cycle, this paper proposes Application Readiness Level (ARL) based on the study of Technology Readiness Level (TRL) and Manufacturing Readiness Level (MRL). It improves the evaluation model of PML and expands the scope of PML. Meanwhile, this paper regarded synergy products as research object, combining the backwardness advantage of product development and the aspiration of innovation in China, it develops a new PML evaluation model of high technology products. The characteristic factors, influencing factors of PML and its grades dividing had also been deeply studied and systematically analyzed, which offers guidance to product development and marketization in China.