14.3.1. Introduction to MDOF Systems

Try these first

1. 1.

   What does MDOF stand for?

   Hint

   Think about the degrees of freedom in a structure.

2. 2.

   Name one example of an MDOF system.

   Hint

   Consider structures that have multiple floors.

3. 3.

   What does the term MDOF stand for?

   • Single-Degree-of-Freedom
   • Multi-Degree-of-Freedom
   • Multiple-Degree-of-Freedom

   Hint

   Think about multiple movements.

4. 4.

   True or False: MDOF systems can only have one natural frequency.

   • True
   • False

   Hint

   Think about what MDOF means.

5. 5.

   Given a stiffness matrix K and mass matrix M, calculate the first two natural frequencies of a simple MDOF system.

   Hint

   Use matrix algebra tools or programming to assist in calculations.

6. 6.

   Discuss how changes in mass distribution would affect the natural frequencies in an MDOF system.

   Hint

   Consider the implications of mass on stiffness and frequency.