International Journal of Research in Engineering and Science (IJRES) ISSN (Online): 2320-9364, ISSN (Print): 2320-9356 www.ijres.org Volume 3 Issue 6 ǁ June 2015 ǁ PP.01-04 www.ijres.org 1 | Page Modeling and simulation analysis of pole side impact crash test sled LIU Pengtao 1 , YIN Jiong 2 , ZHOU Xiying 1 (1.College of Mechanical Engineering, Shanghai University of Engineering Science, Shanghai 201620,China； 2. Shanghai Guan chi Automobile Safety Technology Co., ltd ) Abstract: For the analysis of car crash worthiness of the sled test, according to crash simulation theory ， the finite element model of sled test impact with the energy absorption tube is set up based on the LS-DYNA solver. Simulated analysis is made on the process of sled test impact. verifying the strength of the simulation model, in order to meet the requirements of the test. By analyzing the strength of the sled test, we know the structure needs to optimized. Key words: sled test; numerical simulation, optimize I. Introduction Side pole impact refers to an accident form of collision between the side of the roadside of the vehicle and the roadside cylindrical objects(such as trees, utility poles, etc.).In China, though the proportion of side pole impact is not great, the consequences are often serious. So it is necessary to enhance the research of such accidents and make new safety standards research related to side pole impact. The U.S. Department of Transportation (DOT) has proposed a major regulatory revision of Federal Motor Vehicle Safety Standard (FMVSS) 214 concerning passenger impact protection . The present standard does not address side crashes into fixed narrow objects, which as indicated earlier account for approximately 20 percent of deaths and serious injuries that occur in side impacts. The current standard also does not address head injuries, which account for 43 percent of the total deaths and serious injuries. According to NHTSA the revision would require that all new passenger vehicles, trucks, and buses sold in the United States provide substantial head protection in side crashes [paper]. In NHTSA opinion, the new pole test will more accurately reflect the real world side impact collisions in which head injuries are more prevalent. Other dangerous side-impact crashes often happen when a large vehicle strikes a smaller one at an intersection. So it’s necessary to design a sled test of pole side impact. The article according to the requirement of pole side impact design a sled test. Simulated analysis was made on the sled test, and verifying the strength of the sled test in order to meet the requirements of the test. The sled design principle and analysis method can provide reference for the design of the similar sled. Proposed Side Impact pole test under the FMVSS 214 regulation Designing automobiles with improved protection to vehicle occupants in side impact collisions has become an important area of concern in safety research. One of which is the side impact crashes into fixed narrow obstacles like trees, utility poles, supports etc. In the 214 regulation, MDB does not demonstrate the worst-case scenario since there is too much sill loading and pillar loading. The newly proposed test by NHTSA is more favorable since the area subjected to impact is much more narrow when compared to the MDB tests. Therefore, greater crash energy is concentrated on the driver’s side and transmitted onto the occupant. In this test procedure the vehicle is propelled sideways at an approach angle of 75 degrees with a speed of 20 mph into a fixed rigid pole. As the pole is relatively narrow, there is major penetration into the side of the car thereby affecting the occupant severely on the driver’s seat. In this test, the pole is set to align with the occupant or the driver’s head, so that the worst case scenario can be obtained where the occupant’s body strikes the inner door and the driver’s head strikes the pole.