NAS102 - Dynamic analysis using Nastran

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Length: 
3 Days
Pre-requisites : 
Nastran Basics
Topics: 

Objective:    

  • Review and expand upon Dynamic Analysis topics with Nastran and Patran
  • Introduce model checkout tools for dynamics
  • Introduce advanced dynamic analysis capabilities

Day 1-

The first session of the training discusses Review of Fundamentals of dynamic analysis

  • Single DOF System Undamped and damped  Free Vibrations
  • Single DOF System Undamped and damped   Forced Vibrations
  • Multi-Degree of Freedom System
  • Mass Modeling
  • Coupled Versus Lumped Mass
  • Mass Units and input
  • Normal Modes Analysis

Day 2-                      

The second day session deliberates normal mode analysis, rigid body modes.

The session also cover the details on Normal Modes Analysis for Pre-Stiffened Structures and Model Checkout

  • Rigid Body Modes
  • Rigid Body Modes and Mechanisms
  • How are the Rigid Body Modes calculated
  • Normal Modes Analysis for Pre-Stiffened Structures
  • Estimating Fundamental Natural Frequency
  • Grounding Check and Rigid Body Modes
  • Modal Effective Mass
  • Damping Overview

Day 3-

The day three of the training talks about transient response analysis and frequency response analysis using Nastran.

  • Introduction to Transient Response Analysis
  • Direct Transient Response analysis
  • Modal Transient Response analysis
  • Introduction to frequency Response Analysis
  • Direct Frequency Response analysis
  • Modal Frequency Response analysis
  • Residual Vector Method
  • Enforced Motion