5.12 - Concept of Modal Mass and Modal Stiffness
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Define modal mass in the context of structural dynamics.
💡 Hint: Focus on its role in dynamic analysis.
What is modal stiffness?
💡 Hint: Connect its definition to modal mass and frequency.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does modal mass represent?
💡 Hint: Think about the participation of mass in vibration.
True or False: Modal stiffness is independent of circular frequency.
💡 Hint: Review how stiffness is defined.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A structure has a mass of 200 kg and its first mode frequency is 10 rad/s. Calculate the modal stiffness and explain its significance.
💡 Hint: Focus on how frequency plays into the stiffness equation.
In a multi-story building, if the modal mass of the first mode is 150 tons and the modal stiffness is calculated to be 2500 kN/m, discuss how these values impact the building's seismic design.
💡 Hint: Consider how higher modal mass might affect design criteria.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.