Study on the Structural Improvement Methods for Car Frontal Crash

2012 ◽  
Vol 479-481 ◽  
pp. 2489-2492
Author(s):  
Chao Qun Huang ◽  
Fei Lai
Keyword(s):  
Simulation Analysis ◽  
The Body ◽  
Passive Safety ◽  
Frontal Impact ◽  
Peak Acceleration ◽  
Structure Deformation ◽  
Frontal Crash ◽  
Impact Simulation ◽  
Structural Improvement ◽  
Survival Space

Taking a sedan as the research object, the frontal impact simulation was done. The results showed that the corresponding results of the structure deformation of the body are in agreement with the experimental data. On account of the driving zone and driver survival space that were compressed seriously, some improvements of the front carling were taken in designing. The structural simulation analysis and dummy injury analysis were done to verify the effectiveness of the improved scheme: the peak acceleration of B-Pillar was greatly reduced, the damage value of dummy was significantly reduced, and so greatly improving the car's passive safety.

Development of Validation Metrics for Vehicle Frontal Impact Simulation

2007 ◽  
Author(s):  
R. J. Yang ◽  
G. Li ◽  
Y. Fu
Keyword(s):  
Step Function ◽  
Evaluation Procedure ◽  
Frontal Impact ◽  
Physical Test ◽  
Frontal Crash ◽  
Validation Metrics ◽  
Impact Simulation ◽  
Commercial Code ◽  
The Difference ◽  
And Mathematics

This research addresses the development of validation metrics for vehicle frontal impact simulation. The model validation metrics provide a quantified measurement of the difference between CAE simulation and physical test. They are useful to develop an objective model evaluation procedure for eventually achieving the goal of zero or near zero prototyping. In this research, full frontal crash pulses are chosen as the key items to be compared in the vehicle frontal impact simulation. Both physics- and mathematics-based metrics are investigated. The physics-based metric include a method of using a simplified step function representation and the mathematics-based metrics include methods of wavelet decomposition, corridor violation plus area, and metrics used in a commercial code ADVISER, respectively. They are all correlated to subject matter experts’ rating through optimal weightings. A new metric, considering variabilities from both experts and metrics for frontal crash pulse, is proposed. One example is used to demonstrate its application.

scholarly journals Simulation and Optimization of Body Structure of Electric Vehicles with Offset Collision

2021 ◽  
Vol 2095 (1) ◽  
pp. 012030
Author(s):  
Yuanhe Hu ◽  
Kun Yang ◽  
Hao Chen ◽  
Jiangbo Wang
Keyword(s):  
Electric Vehicles ◽  
Simulation Analysis ◽  
Element Model ◽  
Safety Performance ◽  
Passive Safety ◽  
Body Structure ◽  
Simulation Test ◽  
Simulation And Optimization ◽  
Impact Simulation ◽  
Safety Design

Abstract In recent years, as the rapid growth of the number of electric vehicles, people have more and more requirements on the safety performance of vehicles. However, compared with fuel vehicles, the structure of electric vehicles has its own particularity which makes the safety design of body structure more difficult. Thus, improving the passive safety of electric vehicles and protecting the passengers from injury in the collision to the greatest extent have become important issues for the automotive industry. This paper simulates the frontal offset impact simulation analysis of a certain type of SUV, and analyzes the safety performance of the vehicle from the perspective of member protection. The front side member structure and impact energy absorption which affect the passive safety of the whole vehicle are optimized and improved. The finite element model of the whole vehicle is rebuilt, and the frontal offset impact simulation test is carried out to verify the effectiveness of the optimization scheme.

Prehistoric Effect of the Stamping Process on the Crash Analysis of an Automobile under Frontal Impact

2013 ◽  
Vol 711 ◽  
pp. 149-154 ◽  
Author(s):  
Se Ho Kim
Keyword(s):  
Impact Load ◽  
Crash Analysis ◽  
Frontal Impact ◽  
Vehicle Model ◽  
Side Member ◽  
Frontal Crash ◽  
Full Vehicle ◽  
Load Carrying ◽  
Crash Characteristics ◽  
The Impact

In this paper, a frontal crash analysis is carried out with a full vehicle model in order to investigate the influence of stamping effects of auto-body members on the crash characteristics of the vehicle. Stamping effects are considered for load carrying members such as the front side member and the rear lower. From the analysis result considering stamping effects, it is conformed that stamping history has to be considered for longitudinal members simultaneously that transfer the impact load under the frontal impact. Comparison of simulation result with experimental one also shows that the prediction accuracy of the crash analysis is remarkably improved.

Study on the Difference of Frontal Impact Response among People of Different Sizes

2010 ◽  
Vol 34-35 ◽  
pp. 111-116 ◽  
Author(s):  
Li Bo Cao ◽  
Chong Zhen Cui ◽  
Ning Yu Zhu ◽  
Huan Chen
Keyword(s):  
Human Body ◽  
Injury Risk ◽  
Simulation Models ◽  
Restraint System ◽  
Frontal Impact ◽  
Occupant Restraint System ◽  
Impact Simulation ◽  
The Difference ◽  
Human Body Models ◽  
Multi Body

In this article, seven frontal impact simulation models with same restraint system and different human body models were established through the use of multi-body kinematics software MADYMO. The injuries in head, chest and femurs of different human models and the differences of these injuries were analyzed in detail. The weighted injury criterion was adopted to evaluate the overall injuries of different human body models. The results shows that the injury risk of smaller human body is much higher than the taller human body, and existing occupant restraint system that protects the 50th percentile American occupant well protects other size occupant poorly.

The Body Design and Body Flow Passage Digital Simulation Analysis of the Solar Car

2013 ◽  
Vol 364 ◽  
pp. 14-18
Author(s):  
Xuan Zuo Liu ◽  
Hui Min Wang ◽  
Fei Zhang ◽  
Yu Long Zhang ◽  
Qian Cheng Liu
Keyword(s):  
Theoretical Basis ◽  
Body Shape ◽  
Simulation Analysis ◽  
Digital Simulation ◽  
Three Dimensional ◽  
The Body ◽  
Air Resistance ◽  
The World ◽  
Body Design ◽  
Design And Manufacture

This paper designs the three-dimensional body modelling of a solar car prototype mainly according to the World Solar Challenge rules, and carries on the flow field digital simulation analysis. This paper analyzes the air resistance of the car body and adjusts to the body shape, and ultimately gets a model well accorded with air dynamics. This paper provides scientific theoretical basis for the design and manufacture of the solar car prototype.

Analysis of Lower Leg Injury of Occupant in Frontal Crash Tests Based on China NCAP Protocol

2011 ◽  
Vol 279 ◽  
pp. 400-405
Author(s):  
Zhi Xin Liu ◽  
Ren Jun Wan ◽  
Yong Wan Shi
Keyword(s):  
Test Data ◽  
Lower Leg ◽  
Lower Limbs ◽  
Vehicle Safety ◽  
Upper Limbs ◽  
Frontal Impact ◽  
Passenger Vehicle ◽  
Characteristic Parameters ◽  
Frontal Crash ◽  
Crash Tests

With the popularization of passenger vehicle safety devices such as safety belt, airbag and so on, the chance that occupant’s upper limbs were injured seriously was decreased significantly in frontal impact. However, the injury of occupant’s lower limbs became more and more severe, especially on lower leg injury. 37 groups of test data of China NCAP crash tests including full-frontal rigid crash and 40% offset deformable barrier crash were investigated in this paper, and lower leg injury distributing characteristic of drivers and passengers in these two kinds of crash configurations were obtained. Finally the effect rules of characteristic parameters on lower leg injury were summarized.

Simulation Analysis for Supercavitation Projectiles Penetrating into Metal Targets

2012 ◽  
Vol 217-219 ◽  
pp. 1449-1454
Author(s):  
Wei Cao ◽  
Tie Zhi Sun ◽  
Cong Wang ◽  
Xin Hua Zhao
Keyword(s):  
Dynamic Analysis ◽  
Penetration Depth ◽  
Simulation Analysis ◽  
The Body ◽  
Analysis Software ◽  
Target Plate ◽  
Two Peaks

The process of the supercavitation projectile penetrating into metal targets was simulated by using the dynamic analysis software ANSYS/LS-DYNA, and the deformation、breakage and forces on the body in different initial velocities and the penetration depth were discussed. Analysis results show that there are two peaks of resistance and the velocities is variety almost in linear attenuation when the cone part of the projectile is moving through contacted with the target plate, which provides references for the structure and parameters design of the supercavitation projectile.

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