From the course: Autodesk Nastran In-CAD: Dynamic Analysis

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Direct transient response analysis

Direct transient response analysis - Nastran In-CAD Tutorial

From the course: Autodesk Nastran In-CAD: Dynamic Analysis

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Direct transient response analysis

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- [Instructor] In this video we're going to look at the alternative to the model transient, which is the direct transient. So I'm going to open up a work file. This is the direct transient file. The first thing I'm going to do is to save it into a work area so I can run. I'm going to call this plate direct transient end. Then we need to return to the environments, and to the Autodesk Nastran In-CAD environment. So the model tree appears, and we have a direct transient response set up, so let's just edit that and see what we have. And we're asking for displacement and acceleration output. Let's check the damping. I can see that we have the option for structural damping. I can have structural damping value of four, and the critical frequency of 45 hertz. From previous experience that's the dominant bending frequency. Let's look at the dynamic setup, and we're going to reduce the timestep size significantly, and increase the number of timesteps to 1200 to try and capture the very early…

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