A Sport Utility Vehicle Front Crash Seat Frame Anti-submarine Design And Research

With the continuous development of the global auto industry, the international car production enterprises increasingly fierce competition, continuously introduce new technology impact and lightweight car body. As the automobile body manufacturing level of ascension, the concept of the car seat is in constant innovation, is moving towards function diversified era. At present domestic continuous SUV boom led many OEMs to push the market and the seat also will become more novel variety structure, operation more convenient and concise, more eye-catching appearance. Of course in the expanded function at the same time, the safety of the crew more not allow to ignore, in addition to meet the requirements of mandatory regulations, all OEMs are actively match C-NACP stringent requirements, to cater to the market more attention to quality.C-NACP as high-profile China new car assessment procedures, get more and more people’s attention. The front impact mainly inspects the seat structure strength, the displacement value of the dummy and the damage evaluation etc. All of these and the structure design has a direct relationship. From the point of current market information, each OEM is lack of clear standards and specification for anti-submarine, the requirement of anti-submarine location are also different, lead to directly affect the numerical and experimental results and damage cannot effectively guarantee the high star ratings. Therefore, formulating a reasonable control anti-submarine for testing star ratings, collision safety performance has great significance.By some sport utility vehicle(SUV) of anti-submarine position summary and test evaluation, found that in different SUV car body or cushion structure anti-submarine design position difference is bigger, correlation is not clear, from the design concept of standardization and platforms have a certain gap. This article first test method are applied to prove the effective value of potential function and role, through careful analysis for dummies and displacement, and combined with the deflection of the frame structure, draw a preliminary hidden area, effectively improve front experiment dummy displacement of the pelvis. Secondly considering the passengers ride comfort experience requirements, adjust the anti-submarine area with dummy H point distance, increase the quantity of foaming sag, guarantee the thigh torso extrusion cushion skeleton, no foreign body sensation.Existing frame by the concept of big data processing information, on the premise of lightweight and reduce the cost, the SUV cushion structure optimal design. Using finite element simulation technology to product structure discretization, before the simulation calculation using HyperMesh unit grid will seat frame model, and using LS-DYNA solver of former collision experiment simulation, through reasonable and effective set up the finite element model, find out the skeleton and collapse hazard material stress strain beyond the area of design requirements, improve and overall improved the cushion skeleton strength rigidity, choosing the appropriate stamping materials, adjust the welding position, reduce the risk of weld tear, solved due to adjust H point against the latent failure problem, make the analysis result is consistent with the basic matching test status. Finally the finite element analysis and theoretical calculation, strength check, the dynamic testing method, has realized the harm degree, reduce the dummy and follow up customer’s vehicle to verify the actual effect, the technology will improve the C-NACP before collision test star ratings, make this SUV models more market competitive advantage.Work carried out at the same time, through the various forms of projects already on the market skeleton latent function summary research, comparing the form a written document, draw valuable aspects of this project is applied in the practice, repeated validation of continuous innovation, to accumulate experience in writing, the analysis of evaluation results detailed quantitative concept, define the recommended against the potential location and form design specification, the analysis of evaluation results detailed quantitative concept, actively promote the client application. Prevent potential as a seat design key points, hopes this article can cause the attention of more people, and for the car seat safety design problem solving play the role of reference.