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Siemens Simcenter Madymo has been awarded the ‘Crash Check Innovation of the Yr’ for 2021 by the Automotive Testing Know-how Worldwide (ATTI) journal.

Automotive Testing Know-how Worldwide was launched in 1998 as a quarterly evaluate of the very newest analysis and developments inside the space of automotive take a look at and analysis. With a worldwide circulation of over 15,000, ATTI has grow to be the main and most revered journal overlaying breaking tales within the fields of auto reliability, sturdiness, security, high quality, NVH, and dynamics testing and analysis. They’ve been rewarding the efforts made in areas related to automotive improvement since 2006.

Incomes such recognition from specialists within the subject of automotive testing and analysis means rather a lot for the whole Madymo group! Our groups work relentlessly to develop cutting-edge performance and fashions in Simcenter to assist engineers develop merchandise that may defend and save lives. The award is affirmation of our technique in direction of the event of digital testing strategies, and a stellar encouragement to proceed our product roadmap on this manner.

In current releases, Siemens launched a sequence of developments that earned the software program this award. This weblog goals to look again at a few of these developments to supply an summary of the event work being accomplished by the corporate.

About Simcenter Madymo

Simcenter Madymo is a simulation software program that facilitates sturdy, correct, and time-efficient numerical simulations of varied car safety-critical situations. The software program permits engineers to design and optimize security programs, and contains all kinds of validated human physique and dummy fashions. The software program primarily employs MBD (multibody dynamics) to mannequin and simulate situations related to transportation security. Madymo additionally permits creating finite component fashions and gasoline movement simulations, making itself a multiphysics software program. The consumer interface permits visualization of varied phases of simulations starting from pre to post-processing.

The character of scientific work occurring inside the group is various and never simply restricted to software program improvement. A sound understanding of the necessities and options of the Madymo Solver fuels the event of human,  dummy and security functions. These validated fashions and functions are crucial parts of the product.  The human and dummy fashions  supplied with the software program are important property wanted  to check the kinematics and dynamics of occupant movement in security crucial occasions. A framework for quantifying danger of damage can also be out there within the software program.

The group offers with a number of ideas starting from numerical simulations to biomechanics for human physique and dummy modelling. The basics of those ideas are constantly revisited and quesitoned as a result of a strong scientific basis, coupled with good software program improvement, is vital in   delivering worth to engineering groups all over the world.

Simcenter Madymo Solver Enhancements

Security-critical occasions in a automobile crash final now not than a couple of hundredths of a second. Simulating such occasions requires precisely capturing bodily phenomena that happen at even smaller time scales than the already miniscule period of the simulation. The problem is to develop a solver technique that doesn’t considerably compromise accuracy whereas concurrently providing quick run occasions. Finite component evaluation (FEA) permits the modelling of extra minute particulars of any simulation mannequin, providing increased constancy simulations. This high-detail modelling, nevertheless, comes on the expense of longer simulation run occasions. MBD, which is the first modelling strategy utilized in Madymo, overcomes the issue of excessive run occasions by finely balancing the modelling of minute particulars through the simulation.

In numerous interactions, our clients have expressed that low simulation run occasions, with out extreme reductions to accuracy, are a key function in security simulation software program. Shorter run occasions permit engineers to guage extra security system designs, choosing the right from a broader array of choices. Quicker run occasions additionally facilitate in depth parametric or optimization research, which hastens the protection system design course of for the shopper. The quicker Madymo can run simulations, whereas preserving enough accuracy, the extra worth it will possibly ship to the shopper. Thus, the Siemens group has persistently improved on solver run-times with every new launch.

Solver Run-Time Enhancements

Notably, the 7.8 launch confirmed enhancements in run occasions of as much as 28% relative to the earlier model, in keeping with conservative in-house measurements (determine 1). In apply, many shoppers reported enhancements of 40% and even quicker. But, the method of enchancment has not stopped. New performance, referred to as RESTART, has been applied to additional enhance simulation run occasions.

Figure 1: The 7.8 release of Madymo offered 28% lower run times compared to the previous version, as measured in-house.
Determine 1: The 7.8 launch of Madymo supplied 28% decrease run occasions in comparison with the earlier model, as measured in-house.

RESTART Performance in Simcenter Madymo

The RESTART performance in Simcenter Madymo is a improvement that additional improves upon the run occasions of software program functions and vastly reduces processes at buyer websites. The performance permits customers to begin a number of simulations of a Madymo software from an immediate of curiosity, with out having to create a number of copies and whole simulation runs of the appliance itself.

Think about a state of affairs the place a automobile driver brakes late in response to an impediment that seems out of the blue. The occasion during which the car sharply decelerates throughout its collision course with the impediment is taken into account because the pre-crash section, whereas the start of the crash section is marked by the second that contact happens between the automobile and the impediment. A security system engineer creates a simulation mannequin of this occasion to investigate the efficiency of a number of seat belt designs through the crash occasion.

Conventionally, the designer must outline a number of simulations with the assorted belt designs of curiosity. Every simulation would run the identical pre-crash section and the identical crash state of affairs, however with totally different belt parameters. The simulation of pre-crash occasions usually takes longer, resulting in significantly longer occasions and better disk-space prices incurred by the simulations. RESTART helps keep away from such prices as a result of the whole simulation (i.e. each pre-crash and crash phases) runs solely as soon as. Then, security engineers can enter alternate belt parameters and begin subsequent simulations at the start of the crash section, with out re-running the pre-crash section (determine 2). RESTART performance has demonstrated 67-90% time financial savings in contrast to an entire simulation run, providing groups even quicker total runtimes (determine 3).

Figure 2: RESTART enables safety engineers to evaluate a crash scenario under multiple conditions more quickly by reusing the pre-crash phase for each trial.
Determine 2: RESTART permits security engineers to guage a crash state of affairs underneath a number of circumstances extra shortly by reusing the pre-crash section for every trial.
Figure 3: A comparison of run times between the initial complete simulation, and a subsequent RESTART trial.
Determine 3: A comparability of run occasions between the preliminary full simulation, and a subsequent RESTART trial.

Present and Meant Developments in Human Physique Modelling

Lively Human Modelling

Human physique modelling has seen a number of enhancements with the Madymo Lively Human Mannequin (AHM). Lively human modelling is the subsequent step from passive human and dummy modelling. Because the identify suggests, the AHM can preserve its posture throughout car movement, similar to an actual human being (determine 4). The insights gained from the evaluation of pre-crash occasions have been invaluable throughout mannequin improvement. These insights have supplied a deeper understanding of the mechanics of posture upkeep, which is then applied into the AHM utilizing ideas of management engineering. Every improve to the mannequin is geared toward bettering the present state of mannequin validation and user-friendliness. Presently, the AHM represents a 50th percentile human male, and the creation of a feminine AHM is on the event roadmap. To have the ability to develop the feminine counterpart of the AHM, volunteer exams have been carried out to grasp the biomechanics of feminine occupant movement. This understanding will facilitate the modelling and validation.

Figure 4: The Active Human Model can maintain its posture during a crash event, more accurately reflecting the behavior of real people.
Determine 4: The Lively Human Mannequin can preserve its posture throughout a crash occasion, extra precisely reflecting the conduct of actual individuals.

Pedestrian Household Human Fashions

Along with the already present household of Hybrid III dummies and the Q-child dummy fashions, a household of pedestrian human fashions has been developed and  validated in keeping with the TB024 protocol. This household of fashions constitutes a 95th percentile male, a 5th percentile feminine, a 50th percentile male and a six-year-old little one (determine 5). These fashions are used within the Euro NCAP protocols and can be utilized in quite a lot of assessments related to the protection of susceptible highway customers.

Figure 5: A set of pedestrian models helps asses the safety of more vulnerable road users in the event of an accident.
Determine 5: A set of pedestrian fashions helps asses the protection of extra susceptible highway customers within the occasion of an accident.


The variability of human sizes additionally poses a problem to safety-related simulations, and a very good system must cater to all sizes and populations of individuals. Protecting this want in thoughts, Simcenter Madymo software program permits for human mannequin scaling to varied heights, weights, and relative sizes. This is a vital improvement within the progress in direction of bettering the worldwide state of automotive security.

With the discharge of Simcenter Madymo 2021.1, all Technomatix Jack’s databases have been built-in into Simcenter Madymo’s scaling performance.  Anthropometrically correct human fashions may be scaled in a simple, user-friendly strategy to sizes that are consultant of the assorted world populations (determine 6).

Figure 6: Enhanced model scalability enables engineers to reflect a wider variety of human size, shape, weight and more during simulations.
Determine 6: Enhanced mannequin scalability permits engineers to mirror a greater variety of human measurement, form, weight and extra throughout simulations.

The Framework for Occupant Restraint Testing and Analysis (FORTE)

Subsequent, its more and more necessary to grasp how a number of automotive security programs could work together and work collectively. In the present day, automotive security programs are broadly categorised into two sorts: lively and passive security. Lively security programs stop car accidents from occurring, and passive security programs mitigate the injury induced to occupants in a crash. Digital security management (ESC) is an instance of lively security programs, whereas seat belts and airbags are passive security programs. Because the state of automotive applied sciences advances, extra automobiles are geared up with each sorts of security programs, resulting in an built-in security system inside trendy automobiles.

Simcenter Madymo provides its customers an software particularly for evaluating built-in security programs. This software is known as FORTE. This software offers a user-friendly simulation framework that’s versatile, modular, and fast to arrange. FORTE permits novice security system engineers to simulate quite a lot of safety-related situations with out having to create simulation fashions from scratch (determine 7). The applying is segmented into a number of subsystems, parameterized and paired with quick run occasions, and is fitted to large-scale DOEs and optimization research to reach at appropriate security system designs.

Presently, the appliance is used for security system assessments with the AHM, however is being expanded with a greater variety of human and dummy fashions, overlaying gender, relative measurement, and age. This worth addition, which is within the long-term roadmap, will make FORTE relevant to design programs properly fitted to a number of populations.

Figure 7: The FORTE application makes it easier and faster to set up simulation models for a variety of safety systems.
Determine 7: The FORTE software makes it simpler and quicker to arrange simulation fashions for quite a lot of security programs.

Increasing the digital thread of Simcenter Madymo

Shifting ahead, it is going to be crucial to grow to be extra built-in with the opposite domains of automotive engineering, together with design and simulation processes. Simcenter Madymo is integrating with Simcenter 3D, providing expanded functionality and enhanced user-friendliness for automotive engineering groups. The mixing may also assist the continued enchancment of Madymo.  Siemens has grow to be a powerhouse of information within the subject of simulations over many a long time, and entry to this data will facilitate additional enhancements to the product inside the Simcenter 3D atmosphere, with the purpose being to ease modelling, working and post-processing of security simulations.

Madymo fashions and functions have the potential to be used in large-scale DOEs and optimization research, as talked about earlier. This potential is realized with the combination of Simcenter Madymo with Simcenter HEEDS. Well navigating by means of an intensive design house with nonlinear constraints is a job tailored for Simcenter HEEDS, and this mixture of Madymo and HEEDS, together with all different developments in sight, guarantees to be a security simulation powerhouse.

Different Developments In The Horizon

Upcoming enhancements to the solver embrace improved modelling functionality of compressible fluid (i.e. gasses) flows. This modelling might be invaluable in creating detailed fashions of airbags. Moreover, coupling with accomplice codes in an environment friendly and sturdy method is a worth addition that the group will make out there to its clients.

On the subject of human physique modelling, work has started to enhance the quantification of the danger of damage to car occupants and susceptible highway customers. The corporate additionally plans to offer human fashions which might be validated underneath quite a few loading situations. Far Facet Crash occasions is one such state of affairs during which the group will validate its human and dummy fashions.

Enhancements to the software program’s pre- and post-processing capabilities can also be underneath improvement. Enhancements in modelling interplay between FE and MB subsystems in a simulation is one such enhancement. Moreover, the addition of a completely new protocol ranking device will higher facilitate evaluation throughout post-processing.

The corporate’s new improvement scope and plans are far-reaching, infinite and stay really innovational.  The ATTI journal award is hopefully certainly one of a number of milestones within the improvement journey of Simcenter Madymo and its functions.

For extra details about Simcenter Madymo, go to our Occupant Safety Systems Development webpage or contact us page.

Disclaimer: I am the author at PLM ECOSYSTEM, focusing on developing digital-thread platforms with capabilities across CAD, CAM, CAE, PLM, ERP, and IT systems to manage the product data lifecycle and connect various industry networks. My opinions may be biased. Articles and thoughts on PLMES represent solely the author's views and not necessarily those of the company. Reviews and mentions do not imply endorsement or recommendations for purchase.

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