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Monday, November 1, 2010

Collision energy absorption device buffer crashworthiness of the structure

Highway maintenance vehicle collision occurred and the vehicle strayed into the phenomenon of many conservation areas, at present, the theory of vehicle safety research focused on vehicle active safety and passive safety. This article studies at home and abroad, has been put into use in the energy absorption device, based on the energy absorption in the buffer device at the design stage of the collision energy absorbing impact collision standards and the impact energy absorption characteristics of the theoretical and applied research. Highway collision occurred sounded the warning bell for us, can not prevent the accident in the premise we can only try to reduce the extent of damage brought us a car accident, this car through the comparison of various safety devices to install a buffer can be seen smoking energy device to have this feature, its manufacturing process is simple, easy to replace, to play a buffer vehicle collision energy absorption effect is obvious, the structure is very suitable for the collision and energy absorption. This article has been used with reference to the buffer of foreign energy absorption device structure to design a sample model, using ANSYS / LS-DYNA software to analyze the main buffer absorbing energy absorbing device components - aluminum honeycomb core crashworthiness and energy absorption capacity and discuss its structure using specimens of different wall thickness, cross-sectional size and height of the energy absorption effect, the final model derived by comparative analysis of the optimal size. The fourth chapter focuses on the aluminum honeycomb core energy absorption device for cushioning the energy absorption characteristics, described the honeycomb core manufacturing process. Then the best model obtained in accordance with the previous size of the design for the buffer zone expressway maintenance energy absorption device model, the model identified as the hexagonal cross section, the model consists of two different components, respectively, so the paper design modeling of two parts, a good job for the following study of the foundation. Papers with previous studies of ring systems energy absorption effect, the aluminum honeycomb core with this model a comparative analysis of energy absorption obtained, aluminum honeycomb core in the axial direction of the role of crushing a long time to absorb more energy, more stable process; and ring out the role of the direction of the direction of ring diameter, distance of only a few ring diameters, short duration of action. And the results showed that increasing the number of rings out of the ring can multiply the energy absorption characteristics, while the increase from the third chapter of aluminum honeycomb core to the original twice the height of the energy absorption characteristics of its energy close to twice the original, but not no limit to increase the height of aluminum honeycomb core for its energy absorption capability of unlimited increase. The paper further energy absorption of aluminum honeycomb core properties were compared with the truss structure, obtained the highest energy absorption of aluminum honeycomb core, and the energy absorbed by the superposition of the two about energy absorption device for the entire buffer the absorbed energy. Finally, simulation analysis, the analysis of experimental results with standards and regulatory requirements, compared to the simulation results obtained are valid. 
 
Keywords: Buffer Absorption Equipment, aluminum honeycomb core, truss structures, crashworthiness, energy absorption, LS-DYNA

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