Kampus Merdeka Belajar

Kampus Merdeka Belajar

Ask questions related to general and focused sessions

Frequency Domain Dynamics in Modal Analysis

    • Muhammad Aditya Nugraha

      In "Response Spectrum Analysis of Building" Homework, natural frequencies ranging from 2.4 Hz to 15.4 Hz were obtained. Based on what are these natural frequencies?, considering that no external loading input (such as forces, pressure, acceleration, etc.) was included during the modal analysis

    • Raihan Lutfianto

      Hi Aditya. A very good question here. Response Spectrum model is our way of predicting structural responses due to earthquake-type and shock-type loads. So, the characteristics of this analysis are: "short", "non-deterministic", and "time-dependent". You may consider this figure.

      Response spectrum - Wikipedia


      You are correct, the x-axis here is the natural frequency of the system. To fully understand what the natural frequencies are, please refer to this material https://youtube.com/playlist?list=PLtt6-ZgUFmMLGWlLxHN_TB6MXsWbNoFaG&feature=shared. We will learn this material in 3-4 weeks from now.

Viewing 1 reply thread
  • You must be logged in to reply to this topic.