Modal Analysis of a Cantilever Beam MSC （悬臂梁的模态分析 MSC）.pdf

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Modal Analysis of a Cantilever Beam MSC （悬臂梁的模态分析 MSC）.pdf

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Modal Analysis of a Cantilever Beam MSC （悬臂梁的模态分析 MSC）

LESSON 3 Modal Analysis of a Cantilever Beam Objectives: Create the cantilever beam model as in Lesson 01. Analyze model using MSC.Marc. Compare results to hand solution. 3-1 3-2 LESSON 3 Modal Analysis of a Cantilever Beam Exercise Description: In this Analysis you will extract the first three modes of a simply supported - fixed beam. You will compare these results to theoretical conditions. Next, you will apply an axial load to the end of the beam. This is analogous to stretching a guitar string. The result is the amount the frequency should increase. You will then compare the results of the preloaded and unloaded structure. This entire procedure will be done in a single analysis using three analysis Load Steps. The geometric and material properties for the cantilever beam. are: E = 30E6 N/m2 ν = 0.30 ρ = 0.00074 3-3 Exercise Procedure: 1. Create a new database named natural_frequency.db. File/New ... New Database Name: natural_frequency.db OK In the New Model Preference form set the Analysis Code to MSC.M