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Static structural analysis examples
Static structural analysis examples






static structural analysis examples

The image below shows an example of a structure with 6 modes and its frequencies as reported by a modal analysis performed with ANSYS.

static structural analysis examples

The mass participation factor for each mode (See next step)īy now, the first three items are self explanatory.The number of modes associated with the model.A modal analysis will provide you with the following information: For this purpose one would perform a modal analysis. Now that we know what a mode is, it makes sense for us to determine the modes of the structure that we are studying. This leads us to our first step in our analysis: Step 1: Perform a Modal Analysis When structures vibrate as a result of an earthquake, they vibrate according to one of the modes. “ A natural frequency is defined as that frequency at which a body will vibrate if excited by an external force”

static structural analysis examples

Each mode is also characterized by a frequency (number of complete oscillations per second) called the modal or natural frequency. For example it may oscillate from side to side, up and down or it may twist.Įach pattern of vibration is called a mode and the specific pattern associated with this mode is called the modal shape. However the response of each structure to these vibrations will vary based on a number of factors.Ī structure may exhibit one or more patterns or ways of vibration. Structures that are built on top of the ground will also experience the vibrations. What happens when a structure experiences an earthquake? Earthquakes develop underground, so naturally they are associated with vibrations of the ground. In this article, we will provide a brief summary of one of the commonly used methods of accounting for seismic loads in a static structural analysis. Seismic loads are often considered in static structural analysis to verify protection against structural failure as a result of an earthquake.








Static structural analysis examples