Analysis Of System Dynamics On The Test Of Truck Crash

Along with the rapid development of road transport industry, traffic accidents rose sharply, binding by the traditional method of transport of goods vehicles in an accident easily lapse, to make a secondary scattered cargo traffic, resulting in greater economic losses, so the goods strapping device research and development of binding standards have great significance.Criteria for the formulation of laws and regulations need to be constrained based on experimental data, while the test vehicle crash simulation based entirely on the real test is true and reliable information, but the economic cost is too high, not suitable for repeated impact test, and our country is currently no specific goods system performance constraints of the device impact test. Therefore, the design of low cost, and repeatable test results good vehicle collision safety test become all the more urgent.This paper studied the internal and external impact test of security situation and characteristics, combined with the subject of passive safety testing needs, energy absorption in the buffer put forward a comparative study of two pilot programs. Programme 1, the design of disc spring combination can slow. In contrast to the three groups of 6 series disc spring cushion energy absorption effect, it drow that the disc spring combination of stiffness, accounting for space, quality are large, and absorption of energy is poor. Which cann't alone use in the energy absorption, need to be with other system to play its strengths. Programme 2, a new type of adjustable hydraulic cushion to absorb the program, described its structure and working principle, and the corresponding mathematical model, used MATLAB/Simulink to simulate analyse, and obtained similar waveforms and regulations. The results of the buffer make a reasonable correction and adjustment, Finally highlighted the advantages of adjustable function of the device, figured out a reasonable formula which used to guide practice, when it need to meet certain buffer capacity and buffer energy, which can be buffered by rotating hydraulic unit rotation angleθof the tail protruding device, adjusting the angle resulting in an appropriate buffer force and deceleration waveform to meet the different quality car crash test speed requirements. And against the cylinder wall damping hole layout was designed with high usability.Foton a paragraph in both medium-sized trucks for the prototype test of the impact parameter model car chassis design, builded three-dimensional model diagram, and maked the finite element analysis, with speed v=10m/s of crash simulation test for frame strength, the result was that it could meet the crash test requirements. For the issue of frame stiffness of the load deflection static analysis, test results showed that it would be no major frame deflection, could meet the test requirements.Finally concluding remarks, and discussed the need for improved crash test truck parts, which is better for truck collision test device of future development, and improvement.