Durability analysis of a harvesting vehicle based on modalsuperpositioning

    Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearch


    The present paper describes an approach to predict fatigue damage of a mechanical system applying modal superpositioning. Initially a dynamic FEM beam model including a nonlinear wheel contact model has been developed for the harvesting vehicle structure. A load history is generated for a specific joint in the vehicle. From the influence matrix for the particular joint fatigue life is determined. For the full 3D solid FE model model, modal superpositioning is introduced in order to reduce the computational costs. From modal analysis a limited number of mode shapes can be obtained and full deformation state is determined by modal superpositioning. The developed nonlinear wheel contact model and the modal system are coupled through a 3D beam element. The obtained fatigue life agrees well compared to actual observations and tests performed on a prototype.

    Original languageEnglish
    Title of host publicationProceedings of the 21st Nordic Seminar on Computational Mechanics
    EditorsTrond Kvamsdal, Kjell Magne Mathisen, Bjørnar Pettersen
    PublisherInternational Center for Numerical Methods in Engineering
    Publication date2008
    ISBN (Print)978-84-96736-56-6
    Publication statusPublished - 2008
    EventNordic Seminar on Computational Mechanics - Trondheim, Norway
    Duration: 16 Oct 200817 Oct 2008
    Conference number: 21


    ConferenceNordic Seminar on Computational Mechanics


    • Modal superpositioning
    • dynamics
    • fatigue
    • FEM


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