stage de fin d'études mecanique des solides/simulation f/h

Ansys is the global leader in engineering simulation, helping the world's most innovative companies deliver radically better products to their customers. By offering the best and broadest portfolio of engineering simulation software, Ansys helps companies solve the most complex design challenges and engineer products limited only by imagination. OFFRE DE STAGE 2022 INGENIEUR MECANIQUE DES SOLIDES ANSYS FRANCE 6 MOIS DE STAGE À VILLEURBANNE (BUREAU ANSYS LYON) OBJECTIFS : La dynamique du contact est difficile à résoudre du fait de la difficulté à détecter de manière précise les points de contact et leurs évolutions. En effet, la précision est directement liée au type de géométrie en contact, par exemple: pour un engrenage construit en développante de cercle, des modifications de denture au micron près sont souvent introduit à la denture. Cela permet d'améliorer les performances vibro-acoustiques de l'engrenage. Ce type de mécanisme nécessite donc un maillage suffisamment fin dans la zone de contact pour pouvoir évaluer avec précision la géométrie. De plus, les surfaces en contact évoluent dans le temps, et les coûts de calcul peuvent se révéler prohibitifs. C'est pourquoi des méthodes de réduction de modèle doivent être utilisées pour limiter le nombre de degrés de libertés du système. L'objectif du stage est de tester des modèles réduits de l'engrenage (Component Modes Synthesis, Proper Orthogonal Decomposition, Espace de Krylov) pour la résolution de la dynamique des transmissions par engrenages dans le solveur dynamique multi-corps d'ANSYS. Le stagiaire sera amené à évaluer et comparer les différentes méthodes de réduction (temps de convergence, précision) afin d'effectuer des simulations transitoires longues. PROFIL SOUHAITÉ : * Très bon niveau en Python et/ou C++, * Bonnes connaissances en dynamique multi-corps, * Connaissances en transmission de puissance mécanique, * Un intérêt particulier pour la simulation et le développement. LANGUE DE TRAVAIL: anglais impératif et français de préférence. - GOALS Gear contact dynamics is a difficult physics to simulate. The complexity of the contact points detection and their evolution is the main reason. Contact detection is highly driven by an accurate representation of the gear geometry. For instance: micro-geometric tooth profile modification is usually introduced in gears. This profile modification improves the vibroacoustic performances, but this type of mechanism requires a very refined finite element mesh in the contact area to describe preciselythe geometry. The numerical simulation of such systems becomes demanding. To overcome these limitations and reduce the number of degrees of freedom, model order reduction techniques must be used. The objective of the internship is to test reduced order models of gears (Component Modes Synthesis, Proper Orthogonal Decomposition, Krylov subspace) for solving the gear dynamics in the Ansys multibody solver. The intern will be in charge of assessing and evaluating the model order reduction method (time consuming, precision) to perform transient simulations. MINIMUM EDUCATION/CERTIFICATION REQUIREMENTS AND EXPERIENCE * Master's degree in Mechanical Engineering or Applied Mathematics. PREFERRED QUALIFICATIONS AND SKILLS * Experience with Python and/ or C++, * Knowledge in multibody dynamics and propulsion transmission, * Interested in simulations and development. CULTURE AND VALUES Culture and values are incredibly important to Ansys. They inform us of who we are, of how we act. Values aren't posters hanging on a wall or about trite or glib slogans. They aren't about rules and regulations. They can't just be handed down the organization. They are shared beliefs - guideposts that we all follow when we're facing a challenge or a decision. Our values tell us how we live our lives; how we approach our jobs. Our values are crucial for fostering a culture of winning for our company: * Customer focus * Results and Accountability * Innovation * Transparency and Integrity * Mastery * Inclusiveness * Sense of urgency * Collaboration and Teamwork WORKING AT ANSYS At Ansys, you will find yourself among the sharpest minds and most visionary of leaders, collectively aiming to change the world with innovative technology and remarkable solutions. With the prestigious reputation in servicing well-known, world-class companies, standards at Ansys are high, met by those willing to rise to the occasion and meet those challenges head-on. Because at Ansys, it's about the learning, the discovery and the collaboration. It's about the "what's next" as much as the "mission accomplished". It's about the melding of disciplined intellect with strategic direction and results that have, can and will impact real people in real ways, forged within a working environment built on respect, autonomy and ethics. At Ansys, you will find yourself among those eager to drive the world towards the next best thing with hands planted firmly on the wheel. Our team is passionate about pushing the limits of world-class simulation technology so our customers can turn their design concepts into successful, innovative products faster and at lower cost. As a measure of our success in attaining these goals, Ansys has been recognized as one of the world's most innovative companies by prestigious publications such as Bloomberg Businessweek and FORTUNE magazines. Ansys is an S&P 500 company and a component of the NASDAQ-100. For more information, please visit us at www.ansys.com Ansys is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other protected characteristics. Ansys does not accept unsolicited referrals for vacancies, and any unsolicited referral will become the property of Ansys. Upon hire, no fee will be owed to the agency, person, or entity.