Evaluation of Human Body Dynamical Behaviour During Handling Maneuvers and Crash Test Simulations Using Multi-Body Codes

2006 ◽  
Author(s):  
Francesco Braghin ◽  
Paolo Pennacchi ◽  
Edoardo Sabbioni
Keyword(s):  
Rigid Body ◽  
Human Body ◽  
Dynamical Behaviour ◽  
Crash Test ◽  
Frontal Crash ◽  
Race Car ◽  
Body Dynamics ◽  
Multi Body ◽  
Vehicle Chassis ◽  
Crash Tests

The dynamic behavior of the human body during race car maneuvers and frontal crash tests is analyzed in this paper. Both the vehicle and the human body have been modeled using the multi-body approach. Two commercial codes, BRG LifeMOD Biomechanics Modeler®, for the simulation of the human body dynamics, and MSC ADAMS/Car® for the modeling of the vehicle behavior, have been used for the purpose. Due to the impossibility of co-simulating, at first the accelerations on the driver’s chassis are determined using the vehicle’s multibody code and approximating the driver as a rigid body. Then, the calculated accelerations are applied to the vehicle chassis in the biomechanics code to assess the accelerations in various significant points on the driver.

Sir Robert Stawell Ball and methodologies of modern screw theory

2002 ◽  
Vol 216 (1) ◽  
pp. 1-11 ◽  
Author(s):  
H Lipkin ◽  
J Duffy
Keyword(s):  
Computational Geometry ◽  
Rigid Body ◽  
Lie Algebra ◽  
Screw Theory ◽  
Mechanical Design ◽  
Ball Screw ◽  
Dual Numbers ◽  
Body Dynamics ◽  
Rigid Body Mechanics ◽  
Multi Body

The theory of screws was largely developed by Sir Robert Stawell Ball over 100 years ago to investigate general problems in rigid body mechanics. Nowadays, screw theory is applied in many different but related forms including dual numbers, Plilcker coordinates and Lie algebra. An overview of these methodologies is presented along with a perspective on Ball. Screw theory has re-emerged after a hiatus to become an important tool in robot mechanics, mechanical design, computational geometry and multi-body dynamics.

Structure Improvement of the S Beam Based on the Safety of SUV

2010 ◽  
Vol 34-35 ◽  
pp. 675-680
Author(s):  
Jun Wu ◽  
Li Bo Cao ◽  
Tian Zhi Chen ◽  
Chen Chen Hu ◽  
Bing Hui Jiang ◽  
...  
Keyword(s):  
Rigid Body ◽  
Crash Test ◽  
Fe Model ◽  
Frontal Impact ◽  
Frontal Crash ◽  
Occupant Protection ◽  
Body Model ◽  
Crash Safety ◽  
Rigid Body Model ◽  
Structure Improvement

The S beam of a production SUV appeared instable deformation in frontal crash test, which was not beneficial to occupant protection. So the deformation of S beam should be controlled to improve the crashworthiness. Inner improvement structures were proposed according to the prototype S beam. A frontal crash FE model and a multi-rigid body model were developed and validated to investigate the crash safety of frontal impact. The influences of the improvements to the deformation of S beam and the energy absorption of longitudinal beams were analyzed by the FE model, and the injury risks of head and thoraces were analyzed by the multi-rigid body model. The better improvement structure was adopted in the frame for the crash test to validate the effectiveness of improved scheme, and the result shows better crash performance of frontal impact for prototype vehicle. Meanwhile, simulation study on crash safety of 40% offset crash were also conducted, which indicated that improved scheme was also beneficial for crash safety of 40% offset crash.

Locomotive Underactuated Implement Guided via Elastic Elements (L.U.I.G.E.E): A Preliminary Design

2015 ◽  
Author(s):  
Thomas Reilly ◽  
Jerome K. O’Rourke ◽  
Daniel Steudler ◽  
Davide Piovesan ◽  
Roberto Bortoletto
Keyword(s):  
Human Body ◽  
Equilibrium Position ◽  
Simulation Software ◽  
Dynamics Simulation ◽  
Original Position ◽  
Preliminary Design ◽  
Top Down ◽  
Body Dynamics ◽  
Multi Body ◽  
Elastic Elements

This paper presents the simulation and fabrication of a bipedal humanoid system actuated with linear springs to produce a standing equilibrium position. The humanoid system is comprised of two leg assemblies connected by a hip bracket. Eleven pairs of springs were attached to the system in locations designed to simulate the muscles and tendons in a human body. The assembly was modeled in the multi-body dynamics simulation software SimWise 4D. Simulations were performed to determine the springs’ stiffness and natural lengths using a top-down heuristic approach. After a set of springs were found to produce a good simulated stable position, they were cross referenced to standard commercially-available parts. A final simulation was then performed to verify that the real-world spring values produced a stable system. Working in tandem with SimWise 4D, the humanoid assembly was fabricated using PLA plastic via an extrusion-type rapid prototyping machine. From the results of the simulation, the set of working springs were implemented onto the plastic model. After final modifications, the assembly then produced a standing equilibrium position. Finally, the assembly was perturbed in several directions to ensure that after the system experienced a displacement it would then return to its original position.

The Multi-Body Dynamics Contact Simulation on Transmission Gears

2014 ◽  
Vol 989-994 ◽  
pp. 3037-3040
Author(s):  
Xiao He Deng
Keyword(s):  
Fourier Transform ◽  
Rigid Body ◽  
Simulation Model ◽  
Simulation Analysis ◽  
Rigid Body Dynamics ◽  
Gear Dynamics ◽  
Body Dynamics ◽  
Multi Body ◽  
Shift Gears

Based on the theory of gear dynamics and contact, the paper uses multi-rigid-body dynamics software ADAMS to build transmission simulation model. The model takes the highest shift gears of a transmission as objects to finish gear meshing simulation analysis. The corresponding meshing force and its Fourier transform results are acquired based on the analysis to get the transmission gears meshing properties.

scholarly journals Simulation of a Dummy Crash Test in ADAMS

2022 ◽  
Vol 24 (1) ◽  
pp. B20-B28
Author(s):  
Marek Jaśkiewicz ◽  
Damian Frej ◽  
Miloš Poliak
Keyword(s):  
Design Process ◽  
Human Body ◽  
The Body ◽  
Simulation Program ◽  
Crash Test ◽  
Low Speed ◽  
Simulated Model ◽  
Stiffness And Damping ◽  
Crash Tests

The article presents a model designed dummy for crash test in ADAMS. The simulated model dummy has dimensions, shapes and mass corresponding to a 50-percentile man. The simulation program allows modification of the dummy parameters. It allows to study the dynamics of motion, distribution of forces and loads of individual parts of the body of the simulated model. The article describes the design process and how to select the appropriate stiffness and damping joints for the simulated dummy. The article contains the results of simulation crash tests performed in the ADAMS program, which were compared to results of the Hybryd III dummy physical crash test. The simulation is designed to reflect the greatest compliance of the movements of individual parts of the human body during the low speed collision.

Finite Element based Crash and Impact Analyses of a Newly Developed Road Cum Rail Vehicle

2020 ◽  
Vol 8 (2) ◽  
pp. 103-107
Author(s):  
Abhay Kumar Gupta ◽  
◽  
Sharad Kumar Pradhan ◽  
Lokesh Bajpai ◽  
Varun Jain ◽  
...  
Keyword(s):  
Automotive Industry ◽  
Dynamic Behaviour ◽  
Crash Test ◽  
Frontal Crash ◽  
Rail Track ◽  
Rail Vehicle ◽  
Automobile Design ◽  
Computer Aided Analysis ◽  
Significant Step ◽  
Vehicle Chassis

"The two most significant engineering steps required in developing a good quality vehicle is crash and structural analysis in the field of automobile design. Simulating the crashworthiness of the vehicle is a significant step to design automobiles of the present age and automotive industry has probably the widest application of such simulations. Crash simulation is a virtual representation of a destructive crash test of a vehicle and its components using computer-aided analysis software to examine the level of safety of the vehicle and its occupants by analysing the level and nature of impact stresses occurring in the component and the magnitude and nature of the deformation happening in the cosmponent during a crash situation. In the current study, a road cum rail vehicle is designed. The main purpose of the vehicle is to clean the rail track. Since the vehicle will be used on the live rail track so it is very important to know the dynamic behaviour of the vehicle during crash or impact. The dynamic behaviour of complete vehicle chassis with four rail wheel and for rubber wheel in contact with rails and moving at 60 km/hr is simulated under frontal crash. Further, 10g frontal impact and the 5g rear impact are also applied on the developed vehicle chassis at rest to investigate its dynamic behaviour"

Explicit Poincaré equations of motion for general constrained systems. Part II. Applications to multi-body dynamics and nonlinear control

2007 ◽  
Vol 463 (2082) ◽  
pp. 1435-1446 ◽  
Author(s):  
Firdaus E Udwadia ◽  
Phailaung Phohomsiri
Keyword(s):  
Nonlinear Systems ◽  
Nonlinear Control ◽  
Rigid Body ◽  
Equations Of Motion ◽  
Rigid Bodies ◽  
Constrained Systems ◽  
The Third ◽  
Highly Nonlinear ◽  
Body Dynamics ◽  
Multi Body

The power of the new equations of motion developed in part I of this paper is illustrated using three examples from multi-body dynamics. The first two examples deal with the problem of accurately controlling the orientation of a rigid body, while the third example deals with the synchronization of two rigid bodies so that their relative orientations are ‘locked’ through prescribed dynamical relationships. The ease, simplicity and accuracy with which control of such highly nonlinear systems is achieved are demonstrated.

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