Applied Mechanics and Materials Vols. 505-506

Abstract: SBS modified asphalt has good performance of high temperature and low temperature, it is widely used in high-grade asphalt pavement engineering. But the aging will influence the using performance of asphalt, we select four dosages of modifier and aging for different time, Experimental results show that with the increase of aging time, asphalt penetration is reduced, softening point is elevated, ductility is decreased. According to the macro physical index analysis, find that SBS modified asphalt’s anti-aging performance is improved.

Abstract: On account of the design method shortcomings of cold recycled (CR) mixture with emulsified asphalt,the material compatibility problems between emulsifier and asphalt and RAP were researched,by which the key indicators of emulsified asphalt and the emulsifying effect of different kinds of emulsifier for asphalt is concluded, and summarizes the basic principles of special emulsified asphalt selection for the high-performance CR technology. On the basis of the research at home and abroad, the early strength evaluation methods and indicators are also discussed in this paper that puts forward to three kinds of test methods: cohesive test, raving loss test, coreability test.Finally,the evaluation method was verified in practical project and reached the effect to be hoped.

Abstract: Airport concrete pavement in high latitude northwest area attacked by sulfate of different extent, which influence early strength and ultimate strength of cement concrete. In this paper, the double doped silica fume and fly ash concrete have been made long-term immersion test research. From the mass loss rate, compressive strength and flexural strength, effect on the corrosion resistance are studied with fly ash, silicon ash adding in a composite Portland cement. Methods to improve the performance of sulfate attack resistance are obtained by experiment.

Abstract: To get the quantified indexes of comprehensive capacity about project manager, based on the modal on artificial neural network theory, different influence factors about choice of project manager for highway slope treatment were analyzed , identified, quantified and evaluated , then comprehensive capacity of the manager were analyzed. Such procedure provided a new method for choice of project manager for highway slope treatment.

Abstract: Vehicle handling and stability has effect on positive safety of automotive directly. Test system of handling and stability is built for its road test and the test variables signal can be acquired and stored synchronously. Based on MATLAB GUI, software is developed for the test data processing, so that the stored data is to be analyzed and handling and stability test result is given by the software automatically. Using the test system in paper, handling and stability road test of one domestic sedan is fulfilled and scored, which verifies the applicability of the test system and scoring software in paper.

Abstract: Four rotary-wing micro air vehicles use four motors as the power unit, by adjusting the motor speed control flight of underactuated systems [. In order to achieve four-rotor autonomous vehicle autonomous flight control, preliminary design of flight control system, and use F5F100LEA single-chip as computer control unit, Proposed the flight system hardware design. Vehicle has the advantages of light weight, small size, low power consumption. After several laboratory tests, the design and reliable performance, to meet the aircraft take off, hover, landing flight mode control requirements.

Abstract: The automobile is a complex man-machine-environment system and its quality safety is extensively influenced by the ergonomic factors. In this paper, the judging criterion for the ergonomic safety factors in the automobile recall cases was proposed based on the ergonomics theory. The ergonomic factors for the design and manufacture defects of automobile were analyzed by taking the automobile recall cases in China in 2012 for example. At last, some suggestions were put forward for removing the automobile defects and improving the design and manufacture of automobiles specific to the ergonomic defects of safety belt, seats, airbag and other typical components.

Abstract: Diesel particulate filter is an effective after-treatment technology that reduces particulate matter pollution in the diesel exhaust; however, the regeneration problem of the filter is limiting its commercialization process. This paper introduces the burning concept of premixing combustion into the burner of filter regeneration device and completes the design of premixing burner, combining the precise control of the regeneration process to achieve an effective regeneration of particulate filter, with the regeneration efficiency of 97.4%.

Abstract: The steering stability of a vehicle at high speed is the urgent key problem to be solved of automobile independent development. And it is also the premise and one of the necessary conditions of vehicle safety. Considering of the effects of tire nonlinearity, a 4-DOF dynamics model for a vehicle is established. The yaw rate responses, side slip angle, carriage roll angle and front wheel steering angle with different vehicle speeds are calculated. The calculated values are then compared with the values without considering of the effects of tire nonlinearity. The simulations results show that the vehicle responses can be reflected accurately by using nonlinear tire model. With the bigger vehicle speed, the effects of tire nonlinearity on vehicle high-speed steering stability become more obvious.

Abstract: With the rapid development of the automobile industry and transport, the increasing traffic accidents have become the serious problems for the traffic management. The important issue that we how to deal with the traffic accidents scientifically and make an accurate identification about the traffic accidents is badly in need of solving. Based on the current situation and research methods of traffic accidents at home and abroad, this paper illustrates the research on accident vehicle safety performance technology identification from one of factors causing traffic accidents-vehicles, which makes the identification for the accident vehicles about the operation process. The selection and process of identification items and information record will be strictly controlled to make the work quality and efficiency improve greatly.