Studies
Student Projects and Theses

Student Projects and Theses

Michael Wentingmann vom IWES berät einen Studenten Michael Wentingmann vom IWES berät einen Studenten Michael Wentingmann vom IWES berät einen Studenten © FBG / C. Bierwagen

At the Institute for Wind Energy Systems, students can conduct student projects and/or final theses. This includes interdisciplinary projects, project and seminar theses as well as Bachelor's and Master's Theses. The task descriptions are elaborated in discussion with interested students. We certainly take into account your personal interests and skills.

We supervise students from all engineering disciplines such as Civil Engineering, Mechanical Engineering, Aerospace Engineering or Computational Engineering. An interdisciplinary background is very welcome. A strong interest and affinity to topics all around wind energy are requirements.

Interdisciplinary Project

Task descriptions at IWES are usually formulated in an interdisciplinary context. Hence, an Interdisciplinary Project can also be carried out by a single student. Apart from that, we try our best to facilitate joint group projects in cooperation with other institutes and faculties.

OFFERS FOR STUDENTS IN THEIR BACHELOR'S

The Institute for Wind Energy Systems offers the following topics for students in their Bachelor's studies. The proposed tasks can be adapted individually according to the respective type of thesis (student project or Bachelor's Thesis) and the respective volume of work. We are also open for ideas and proposals of the students. Please contact us and we discuss how to proceed.

  • Optimisation Algorithms in Multi-Axial Fatigue Life Analysis (Bachelor's Thesis)

    Introduction and Scope of Work

    Principle stress directions vary in time under multiaxial loads. In brittle matrials (e. g. adhesives in wind turbine rotor blades or cast iron in rotor hubs), this results in fatigue damage that is not evenly distributed among material planes, but is concentrated around a single plane, which is called the critical plane.

    In fatigue life calculations of such materials, the damage on the critical plane is governing, and not the accumulation of damage on all material planes, as would be the case for ductile materials. The identification of the critical plane is thus of utmost importance. However, that is linked with very high computational cost. In order to reduce the computation times, different optimisation algorithms have to be tested in the context of this Bachelor's Thesis.

    Prior knowledge on fatigue life analysis is not necessarily required. Further details are given in the offer (in German only).

    Requirements

    • Prior experience in Matlab is required.

    Offer

    Show and/or download the PDF version of the offer (available in German only).
    PDF
  • Comparison of Multi-Axial Methods for the Cycle Counting in Fatigue Analyses (Bachelor's Thesis)

    Introduction and Scope of Work

    For uni-axial fatigue analyses, rainflow counting is a standard method for the counting of cycles. It yields reliable results at low computational cost. For multi-axial loads, the traditional rainflow counting schemes do only offer meaningful information on the identified cycles, if the principle stress directions are approximately constant over time. In that case, we speak of proportional loads.

    For non-proportional loads, traditional rainflow counting algorithms can yield severe inaccuracies in fatigue life estimations. In this case, multi-axial rainflow count algorithms are required in order to improve the prediction accuracy. In this work, different variants of multi-axial rainflow counting are to be compared in the framework of benchmark examples.

    Prior knowledge on fatigue life analysis is not necessarily required. Further details are given in the offer (in German only).

    Requirements

    • Prior experience in Matlab is required.

    Offer

    Show and/or download the PDF version of the offer (available in German only).
    PDF

OFFERS FOR STUDENTS IN THEIR MASTER'S

The Institute for Wind Energy Systems offers the following topics for students in their Master's studies. The proposed tasks can be adapted individually according to the respective type of thesis (student project or Master's Thesis) and the respective volume of work. We are also open for ideas and proposals of the students. Please contact us and we discuss how to proceed.

  • Optimisation Algorithms in Multi-Axial Fatigue Life Analysis (Interdisciplinary Project / Project Thesis / Seminar Thesis)

    Introduction and Scope of Work

    Principle stress directions vary in time under multiaxial loads. In brittle matrials (e. g. adhesives in wind turbine rotor blades or cast iron in rotor hubs), this results in fatigue damage that is not evenly distributed among material planes, but is concentrated around a single plane, which is called the critical plane.

    In fatigue life calculations of such materials, the damage on the critical plane is governing, and not the accumulation of damage on all material planes, as would be the case for ductile materials. The identification of the critical plane is thus of utmost importance. However, that is linked with very high computational cost. In order to reduce the computation times, different optimisation algorithms have to be tested in the context of this work.

    Prior knowledge on fatigue life analysis is not necessarily required. Further details are given in the offer (in German only).

    Requirements

    • Prior experience in Matlab is required.

    Offer

    Show and/or download the PDF version of the offer (available in German only).
    PDF
  • Linear and nonlinear buckling analysis of rotor blades in the multi-MW class (Student Project or Master's Thesis)

    Introduction and Scope of Work

    Buckling is a mechanism of stability failure in thin-walled structures which are exposed to compressive stresses. Buckling is a bifurcation problem, where large displacements perpendicular to the structure plane occur instantaneously. This phenomenon reduces the structural integrity of the respective structures dramatically, hence it is understood as failure. Since the growth in size of rotor blades is an ongoing trend, increasingly large structural parts are loaded by increasing loads. Consequently, the risk of buckling increases as well.

    In the framework of this work, selected rotor blades in the multi-MW class have to be analysed with respect to their buckling resistance. For this purpose, 3D finite element analyses have to be carried out, including linear and nonlinear buckling analyses. If the task is conducted as a Master's Thesis, additional subtasks have to be investigated.

    Further details are given in the offer.

    Requirements

    • Ideal candidates have some basic experience in finite element application.

    Offer

    Show and/or download the PDF version of the offer (available in German only).
    PDF
  • Comparison of Multi-Axial Methods for the Cycle Counting in Fatigue Analyses (Interdisciplinary Project / Project Thesis / Seminar Thesis))

    Introduction and Scope of Work

    For uni-axial fatigue analyses, rainflow counting is a standard method for the counting of cycles. It yields reliable results at low computational cost. For multi-axial loads, the traditional rainflow counting schemes do only offer meaningful information on the identified cycles, if the principle stress directions are approximately constant over time. In that case, we speak of proportional loads.

    For non-proportional loads, traditional rainflow counting algorithms can yield severe inaccuracies in fatigue life estimations. In this case, multi-axial rainflow count algorithms are required in order to improve the prediction accuracy. In this work, different variants of multi-axial rainflow counting are to be compared in the framework of benchmark examples.

    Prior knowledge on fatigue life analysis is not necessarily required. Further details are given in the offer (in German only).

    Requirements

    • Prior experience in Matlab is required.

    Offer

    Show and/or download the PDF version of the offer (available in German only).
    PDF

CONTACT FOR GENERAL QUESTIONS ON STUDENT PROJECTS AND THESES

Foto von Claudio Balzani Foto von Claudio Balzani © Anastasia Schuster
Dr.-Ing. Claudio Balzani
Office hours
Please arrange an appointment
Address
Appelstraße 9a
30167 Hannover
Building
Room
727
Foto von Claudio Balzani Foto von Claudio Balzani © Anastasia Schuster
Dr.-Ing. Claudio Balzani
Office hours
Please arrange an appointment
Address
Appelstraße 9a
30167 Hannover
Building
Room
727