Applied Mechanics and Materials Vol. 722

Abstract: Seismic ground response analysis methods are categorised into linear, equivalent linear and non-linear methods that perform the analysis in the time or the frequency domain.The equivalent linear and the non-linear methods are two main methods of seismic response analysis for soil layers. The Equivalent linear method is the most common soil seismic response of a way to analyze in the current engineering practice. In recent years, the study on method of seismic response analysis of nonlinear soil layers is an important content in research domain of geotechnical earthquake engineering now. In this paper, these two methods’ basic principles are clarified briefly, Their developing courses and actualities are summarized. According to their basic principles and application practices, their merits and shortcomings are pointed out. The reasons why the merits and shortcomings appear are analyzed briefly.

Abstract: In this paper the drawing process of Box-torque was simulated by Dynaform, which is FEM simulation software. The process parameters, which affected the quality of forming, were optimized by finite element simulation. The emphasis was focus on the optimization of draw-bead and BHF and data were summarized from the optimization graphs. In this simulation, lengthways draw-bead was set on the technical face for reducing or eliminating wrinkle. It was innovation difference from the usual that the draw-bead was set on binder. Finally the correctness of simulation was approved by comparing the optimization of simulation with the data of experimentation.

Abstract: Aiming at problems of lack of theoretical research and existing resources, etc., in equipment’s combat resilience design for the chinese military, a new kind of equipment’s combat resilience design theory-TRIZ contradiction maters are used to describe the technical conflict in practical problem, the conflict resolving matrix is used to analysis problem, and the principle to solve the contradiction is given at last. This theory is strongly to solve the contradiction problem. For these reasons, the equipment’s combat resilience design process is proposed in this paper, and then taking the battlefield maintenance of radar phased array antenna as an example, this paper analyses the improvement design method to introduce the design of phased array antenna by using the TRIZ conflict matrix. The results show that, TRIZ conflict matrix can effectively guide the equipment’s combat resilience design, and can indicate the direction for the equipment’s combat resilience design to improve design efficiency.

Abstract: This paper designs a new type of electro-magnetically actuated system, it uses alternating electromagnetic force to drive two permanent magnet sliders reciprocating movement, though the role of crank connecting rod mechanism output torque, moreover, the feasibility of electromagnetic power drive system and realizes the effectively control of the drive system are analyzed in this paper. Firstly, we use the construction model established by the ADAMS software to process dynamics and kinematics simulation analysis. Then, the data is used to design control system. Finally, the results show that the system is feasible and practical.

Abstract: To meet users’ actual demands for fine-grained access control (FGAC) to data object in web-based parts resource sharing platform, a FGAC approach for parts resource sharing is proposed to enable both the providers and administrators to manage the permissions of parts resource jointly. In this approach, all levels of detail (LODs) are introduced in the part resource information firstly. Then, a role-based access control model for parts resource sharing, called RBAC_PRS, is provided on the basic of RBAC (Role-Based Access Control) and O-RBAC (Owners-Based Access Control) models, and the permission administration policy is also formulated in condition of the separation between ownership and usufruct of parts resource. To provide the better authorization route, two middle layers: function sets and component sets, are added in permission-role assignment process, and each role’s assignment rules are explicitly specified in an XSLT style sheet. Furthermore, an XML-XSLT based approach is adopted to accomplish the diversity expression of user-accessible view based on FGAC. And it could ensure to practice the web-based knowledge sharing system safely.

Abstract: The roll forming production line with fixed mould and moving roll of variable cross-section is a hydromechatronics line that implements the automatic processing of vehicle parts. Some technical problems of mass production of complicated cross section parts can be solved successfully by the production line, such as the low stability, the uncontrolled dimensional accuracy and the sheet deformation while a variable cross-section is cut off. The control system for the complete production line mainly consists of these parts: Siemens Simotion D455-2 motion control system, IPC, touch screen, ET200M input and output modules and so on. In order to develop the control system for the production line, the article completed system general design, full-closed loop control structure design and software design. It also completed building of hardware platform, development of software system and research of interpolation algorithm. Through several experimental verifications, the control system for the production line can meet the requirement of actual production.

Abstract: Cement decomposing furnace is a typical multi-variable, nonlinear, large delay and strong coupling complex control object, its difficult to establish accurate mathematical model, the conventional control algorithm is difficult to get satisfactory control effect. By applying adaptive BP(back propagation) algorithm in neural network modeling, make the neural network predicts the decomposing furnace outlet temperature, then modify the pulverized coal flow rate value that obtained by the fuzzy controller to control the decomposing furnace outlet temperature. The field application shows that the control software which is designed by the control algorithm in this paper responses quickly, the error between actual temperature and the expected value is small, it has a good reliability, adaptability and robustness.

Abstract: The research is to automatically testing and analyzing machining accuracy for the finished product by Pneumatic Measuring technology including the technology of data acquisition and the theory of disposition of data .To build a feasible system to analyze the machining error using Pneumatic measuring instrument to measure the parts by sensor to change the atmospheric pressure. A data acquisition card is used to gather and save the data. By programming software to write internet applications to statistical analysis for data, draw normal distribution figure, scatter diagram and histogram. To analyses the graph gains estimate the machining error and improve the performance for machine. By the experimental tests verify the feasibility and validity of the system.

Abstract: The paper proposes a cascade control strategy of speed feedback in inner loop and temperature feedback in outer ring for hydro-viscous driven fan cooling system, and compares the simulation of PID and fuzzy PID. The simulation result shows that the double-loop control system while the response time longer, but much smaller overshoot, can achieve a good feedback to adjust the fan speed and temperature and realize stepless speed regulation of hydro-viscous driven fan cooling system under the premise of stability for fan speed and system temperature.

Abstract: With the development of global industrial, electromechanical products enterprises create wealth for the mankind at the same time, but also consume a lot of resources, and cause serious environmental pollution. In the design stage, enterprises must consider to prevent environmental pollution, to save resources and energy. The whole life cycle of electromechanical product refers to design, manufacturing, transportation, sales, use, and recycling etc. Protection resources and environment is the whole life cycles core. Green design is from cradle to cradle. The technologies of green design are different from the traditional design which is only pay attention to function. It is not only to meet the needs of the people and solve the problem for the traditional starting point for the design, but also must to consider the use of natural resources, reduces types and quantities of pollutants, effective reuse, and reasonable cost of materials.