From the course: SOLIDWORKS Simulation: Dynamic Analysis
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Mass participation background - SOLIDWORKS Tutorial
From the course: SOLIDWORKS Simulation: Dynamic Analysis
Mass participation background
- [Narrator] In this video we're going to look at the background to mass participation. Now we've mentioned previously that in normal modes analysis we can't calculate the relative amplitude of each mode. Simply, each one is a mode shape. To find a relative amplitude, we're gonna have to do some kind of response analysis. Now an exception to this is base motion. This occurs where the structure is connected to ground and the ground moves or shakes and takes the structure with it. If we assume a unit excitation on the base, then the term called the modal effect to mass can be calculated. Now SolidWorks describes this term as mass participation, and that's the term we'll be using from now on. Now the key thing is that mass participation, or more commonly known as modal effective mass is actually calculated in the normal modes analysis. At the top here we see the mass participation table that can be requested after we run a normal modes analysis. The structure that the table represents is…
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