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The 2019 THUMS European Users' Meeting

JSOL is delighted to announce The 2019 THUMS European Users' Meeting.
THUMS, the Total Human Model for Safety for use with LS-DYNA® is being rapidly adopted by users worldwide.
We invite you to join us and share in THUMS technical information.


Title: The 2019 THUMS European Users' Meeting
Dates: Friday, May 17th, 2019
Reception for the conference starts at 9:30am.
  • THUMS users.
  • Customers who are interested in THUMS.
Venue: Conference Center Koblenz
Koblenz Kongress - Rhein-Mosel-Halle 1F Tagungszentrum 1
Julius-Wegeler-Strße 4, 56068 Koblenz, Germany [Web ]
Expected number of participants: 50
Registration Fee: Free
Organizer: JSOL Corporation


Reception for the conference starts at 9:30am.

Introdction&THUMS Modeling
Mr.Takahiko Miyachi
JSOL Corporation
Study of Occupant Kinematics in Automated Driving Vehicles during Frontal Collisions
Mr.Shigeki Hayashi
Toyota Motor Corporation
Traffic accidents will still remain in a future traffic society in which autonomous vehicles and conventional vehicles coexist.
In addition, when assuming an autonomous vehicle, it is conceivable that the occupant takes various postures such as comfortable posture.
In this study, we investigated occupant kinematics of various occupant postures assuming a frontal collision accident of autonomous vehicle using a human model THUMS.
There is a large amount of head and pelvis movement for the front facing occupants in a comfortable posture. Rear facing occupant slides up along the seat back.
These findings suggest the necessity of verification of human body model for various postures, establishment of evaluation method, and development of restraint devices.
It shows that THUMS is useful for crash safety analysis of autonomous vehicles.
Sensitivty of THUMS rib fracture risk prediction in various loading conditions.
Dr. Andre Eggers
Federal Highway Research Institute (BASt)
For the design and assessment of occupant protection systems human body models are meanwhile used to predict the risk of rib fractures. To use these models in a reliable and efficient way within this process, it is important to better understand the sensitivity and reliability of HBM based rib fracture prediction methods. This study will show the results of different approaches for rib fracture risk estimation in various frontal sled simulations that were performed within the SENIORS project. Furthermore, within the OSCCAR project this study will be extended to analyze the sensitivity of different methods to extract the rib strain. The results can contribute to harmonize the complete HBM based rib fracture prediction process, which will finally be necessary for a virtual testing based assessment procedure.
Contributions of THUMS User Community project to standardised application of human body models
Dr. Steffen Peldschus
LMU Ludwig Maximilian University
In several research projects and application scenarios, human body models in part or full-scale are being introduced as productive assessment tools in raod safety. This opens new questions in application handling and result interpretation. The project THUMS user community is tackling those questions. The presentation will give examples from validation, robustness evaluation, positioning handling and risk estimation on the attempt to develop standardised procedures allowing to increase the confidence in results derived by virtual testing employing human body models.
Applications of THUMS within the European Research Project OSCCAR
Mr. Christian Mayer
Daimler AG
Human Body Models (HBM) have become an essential tool for Finite Element analysis studies involving human characteristics in vehicle safety related applications. With the introduction of highly automated driving accident scenarios might significantly change in the future and new vehicle interiors are currently discussed and will be realized. The European research project OSCCAR (EU Horizon 2020 research and innovation program; grant agreement No 768947) will address this development with the implementation of an integrated, virtual assessment framework and further qualification and consolidation of HBM. The lecture gives a brief introduction to OSCCAR and will in particular show applications of diverse THUMS versions (THUMS V4, active THUMS-D, obese THUMS-D, THUMS-TUC, Asian anthropometry) now in the first project phase within a baseline study.
Benefits of Pre-Pretensioning in Braking and Avoidance Maneuvers - Human Body Modelling Approach
Dr. Bengt Pipkorn
Autoliv Sverige AB & Autoliv Research
The number of vehicles with autonomous pre-crash braking and avoidance systems on the roads are increasing. The sensor information that is used to initiate the braking and avoidance maneuvers can also be used for reversible activation of pre-crash activated occupant protection systems such as pre-pretensioning the seatbelt. To evaluate the potential injury reducing benefits of reversible occupant protection systems in a crash that was preceded by an avoidance maneuver (long duration) the influence of muscle activation on occupant kinematics has to be included in the evaluation. To enable prediction of human kinematics during braking and avoidance maneuvers a human body model, SAFER THUMS, with the capability to activate muscles was developed. Muscle activation was realized by a closed loop control system. For development and validation of the SAFER THUMS human body model numerous volunteer experiments were carried out. Both braking and avoidance tests were carried out with vehicle occupants that were both aware and unaware of that the vehicle was going to do a baking or avoidance maneuver. In the tests muscle activation was measured by means of surface electrodes and the displacements of the various body parts were extracted by means of film analysis. The model was validated by means of the results from the volunteer tests. The validation was carried out by tuning the closed loop control system parameters that controlled the activation of the muscles until there was agreement between the test results and the model predictions. The model was validated for prediction of occupant kinematics in both braking and avoidance maneuvers The model was used to evaluate the potential injury reducing benefits of pre-pretensioning the belt during pre-crash braking or avoidance followed by a crash. The benefits for various levels of pre-pretensioning, duration of braking and avoidance and crash velocities were evaluated. The pre-pretensioning force levels were varied from 180N to 900N, the braking and avoidance durations were varied from 0.5 to 1.5s and crash velocities were varied from 35 to 72km/h. It was found that pre-pretensioning the seatbelt significantly influence the occupant kinematics and the position of the occupant at time of impact if a crash occurs. It was also found that pre-pretensioning can reduce the risk for a 45 and 65 year old vehicle occupant to sustain two or more rib fractures in a crash that was preceded by an avoidance maneuver.
Investigation for efficient pre-simulation method in THUMS application
Dr. Noriyo Ichinose
JSOL Corporation
THUMS is one of the most precises human model for geometry, mechanical response and human reaction in crash analysis. Corresponding to improvement of simulation accuracy, the model size is getting larger and larger. This means that calculation cost is getting higher as well. In case of sled analysis with THUMS, pre-simaulation like positioning and seating is required to get more realistic simulation results. This pre-process makes turn around time of sled analysis 2 or 3 times larger than using FE dummy model.
Reduced oder model (ROM) approach has possibility to reduce this time consuming process by using principal component analysis. ROM is one of the non-linear response function based on some input data as training data set. Unlike usual machined learning approach, ROM has physical meaning and this can require less number of training data sets.
In this presentation, our investigation to find efficient way to reduce calculation time in pre-simulation with ROM approach will be shown. Pre-simulation is positioning and seating analysis with THUMS version 4 in this presentation.
Closing Remarks

note: the program is subject to be changed.


The registration has been closed.
Thank you for a lot of application.


Users Meeting Secretariat
JSOL Corporation, Engineering Technology Division


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