Mechanical Engineering

Lecturer(s): Olivier DESSOMBZ, Bertrand HOUX, Didier LACOUR, Emmanuel RIGAUD, Joël PERRET LIAUDET
Course ⋅ 18 hTC ⋅ 22 h


Approaching the design, dimensioning and construction of a mechanical system, as well as the study of its operation. The 1st part makes it possible to understand the architecture of a mechanical system from the description of the connections between the parts and to define the toleranced geometry of the functional surfaces. The 2nd part makes it possible to establish the equations of motion of a system of solids, from a Newtonian approach or a Lagrangian approach based on the principle of virtual power. The 3rd part makes it possible to dimension the slender deformable structures in stresses and displacements, from the internal forces induced by the loading and the reactions to the connections.

Palabras clave

Forces and connections, Functional dimensioning, Analytical mechanics, Principle of virtual power, Lagrange equations, Beam theory, Stress and displacement dimensioning


  • Mechanical Technology Program: Forces and connections in mechanical systems. Functional specifications and product definition.
  • General and analytical mechanics of rigid body systems: Description of the movement, fundamental principle, principle of virtual powers (PPV), model assumptions. PPV for a single solid, definition of the different torsors, kinetic energy theorem. PPV for a system of solids, diagramming of connections, Lagrange equations. Limits of the model.
  • Strength of materials: Definition, diagram of a beam and model assumptions; inner efforts. Elastic sizing. Constitutive law. Limits.

Important information about the assessment:

  • In the event of an unjustified absence from an assessment, the score for this assessment is then zero.
  • Only excused absences can give access to remedial sessions.

Learning Outcomes

  • Knowing how to analyse the architecture of a mechanical system and its geometric description from technical drawings.
  • Knowing how to design a mechanical system and define its rating that respects the conditions for proper operation.
  • To be able to analyse the dynamic behavior of a system of rigid solids.
  • Know how to size a slender part subjected to static loading.


Final mark = 100% Knowledge Knowledge = 84 % final exam + 16% continuous assessment