Aircraft Cabin Interior Monuments Stress Analysis & FE modelling in MSC.PATRAN

A 3 month course on stress analysis of aircraft cabin interior monuments. This course also provides a great level of understanding of 14 CFR part 25 Certification rules & regulations. This will enable young professionals and students to take up roles in aircraft certification profession in the future.

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A Quick Overview

This course provides a deep insight & understanding about aircraft Cabin Interior structures, like galleys, & other structural monuments like Seats, Lavs etc. This course covers the core concepts of design, stress analysis & certification (EASA part 21J&G) of aircraft structural monuments. It also provides a step by step procedure to carry-out a Finite element analysis of an aircraft Galley.

This course provides the students a complete understanding of how aircraft galleys are tested using Whiffle Tree Concept. This course also provides a bigger perspective of Composite Stress Analysis in Engineering and will definitely enable the students to apply these practical concepts in their future project activities also.

In addition to the theoretical & practical FE concepts covered, this course provides a great level of understanding of 14 CFR part 25 Certification rules & regulations. This will enable young professionals and students to take up roles in aircraft certification profession in the future.


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COURSE SYLLABUS

1Fundamental Aspects/Introduction to Cabin Interiors

  • Types of Cabin Interior Monuments
  • General Design and Construction
  • Stress/Certification process
  • Meeting Customer Expectations
  • Product Delivery procedures

2Composites - Basics

  • Introduction to composites
  • Types, advantages & disadvantages
  • Stiffness terms & ABD matrix
  • Composite Manufacturing

3Loads & Modelling Approach

  • Load factors
  • Load case derivation
  • Different Load modelling methods
  • GA drawing - Overview

4FE modelling – Galley Part 1

  • Modelling of structural Panels
  • Modelling of Upper and Lower attachments
  • Cabin Zones
  • Stiffness definition – Upper & lower attachments
  • FE Modelling of Floor

5FE modelling – Galley Part 2

  • Trolley Compartment Load application
  • FE modelling of Mortise – Tenon Joints
  • FE modelling of Split Line Joints
  • Composite panel property definitions
  • Ply orientation checks and Material coordinate system

6FE modelling – Galley (Post Processing)

  • MSc. NASTRAN deck creation
  • Investigation of
    1. Model deflections
    2. Interface Loads Extraction
    3. Contact Investigation

7Galley Testing - Introduction

  • Overview of structural testing & procedures followed
  • Test setup – Overview
  • Load cases tested
  • Whiffle & dead weights testing
  • Results correlation

8Galley Testing – Mass Combination and Whiffle calculation

  • Mass Combination – Illustration
  • Whiffle calculation – Illustrated with example
  • Test Report – customer expectations

9FE analysis of Entertainment system

  • FE modelling of Business class seat entertainment system
  • Modelling of important structural elements
  • Other challenges & considerations

10Cabin Safety & Part21J DOA

  • What is DOA and who is the approval authority?
  • Part21 Subpart J requirements
  • 14 CFR 25 Rules
  • Egress Considerations
  • Emergency Equipments

11Structural Certification Procedures

  • Major and Minor changes
  • Types of changes
  • Certification process

12Composite Repairs and Best Practices

  • Damages – types & overview
  • Repair Procedures
  • FE methods


Projects Overview

Project 1

Highlights

  • Build a Boxed compartment in FE as shown in the figure at the bottom. The model has a wall ‘A’  & Box ‘B’.
  • Use the material properties (PCOMP) as same as in Task #3.
  • For the wall panel ‘A’, PCOMP property should have 4 plies each side of the core. (4 lamina plies of backing skin & 4 lamina plies of facing skin.
  • For the box ‘B’, each panel should have 2 plies of backing and 2 plies of facing skin.
  • Panels of Box ‘B’ will be connected with each other using node equivalancing. The Box ‘B’ will be attached to Wall ‘A’  using CBUSH elements. Each panel end of Box ‘B’ will have 4 CBUSH elements distributed along its length. Stiffness of the CBUSH elements is 1.5e5 N/mm in all the 3 directions.
    • Simulate a force equivalent to 10kg in the +X direction with a Load factor of 9.0 at the CG of box ‘B’. Use RBE2 to connect the CG node with the nodes of the bottom panel of box ‘B’. Run solution 101, create displacement & Stress plots.
    • Simulate a downward load equivalent to 10Kg in the –Z direction, applied at the bottom panel of Box ‘B’ directly. Load factor for the down case is 8.1. Run solution 101, create displacement & Stress plots.

 

Project 2

Highlights

  • IGS file is provided for seat entertainment monitor geometry (as per the figure shown below)
  • Monitor (blue colour - #4) need not be modelled in the FE analysis. Assume a material property of AL2024-T3 (AMS-QQ-A-250/4) for plates #1, #2, #3.  Base plate #1 is attached to the seat using 6 bolts. Bolts need not be modelled in FE. Attachment point can be constrained in all 6 DOFs.
  • Apply a load of 250N in –Z direction at the location circled in red circle for load case #1. Apply a load of 200N in the –X direction at the same location for Load case #2.
  • Tabulate the forces seen at the bolt locations in both cases & also create deformation & stress (max & min principal) plots for Baseplate #1.

Project 3

Highlights

Objective of this project

  • To Study the FE model of Full Galley 
  • Apply boundary conditions (all 6 DOF) at upper & lower attachments
  • To apply payloads at the upper compartments
  • Perform PATRAN/NASTRAN sanity checks (perform free-free modal analysis)
  • To perform FE analysis (SOL 101) in NASTRAN & obtain Op2/Xdb
  • To determine (tabulate) the interface loads obtained from the FE model

 

 


What will the student gain from your course?


  • Clear understanding about composite FE analysis of Cabin Interior monuments & the challenges involved, Design of different type of aircraft interior monuments, Good understanding about PATRAN – pre & post processing, complete understanding of Monument testing and Customer expectations in the aero-industry

SOFTWARE COVERED


COURSE FEE

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Frequently Asked Questions

1Who can take your course?

Graduate and Post Graduate Aeronautical and Mechanical engineering students from final year and freshers. Anyone at the beginning stage of composite design and FE/Stress analysis engineering.

2What is included in your course?

Overview of aircraft Cabin Interior Monuments, Illustration of FE analysis of a typical Galley, Part21J procedures

3What will the student gain from your course?

Clear understanding about composite FE analysis of Cabin Interior monuments & the challenges involved, Design of different type of aircraft interior monuments, Good understanding about PATRAN – pre & post processing, complete understanding of Monument testing and Customer expectations in the aero-industry.

4What software skills are you teaching and how well are these tools used in the industry?

The course is basically theoretical in which MSc. PATRAN & MSc. NASTRAN will be used to build FE analysis model and obtain the results desired.

5What is the real world application for the tools and techniques will you teach in this course?

Aerospace, General Aero industries, Composite manufacturing, aircraft interior design and manufacturing.

6Which companies use these techniques and for what?

Almost all industrial companies are using such methods such as Boeing, Airbus, Collins, JAMCO, Safran Interiors, Zodiac, BAE, Mirus, UTC... etc.

7How is your course going to help me in my path to MS or PhD?

You will learn about basic fundamentals & analytical skills and the best practices adopted in the industries worldwide which are desirable for higher education

8How is this course going to help me get a job?

This course provides a bigger perspective of Composite Stress Analysis Engineering and / or you may apply this knowledge for your project activities also. These efforts can help you to get an interview call from myriads of different reputable industrial companies.

9What is the ratio of theory to hands-on practical content?

In this course, the ratio is almost 50 / 50, however, the quality and impact of pragmatic content is more.


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Certification

  • Top 5% of the class will get a merit certificate
  • Course completion certificates will be provided to all students
  • Build a professional portfolio
  • Automatically link your technical projects
  • E-verified profile that can be shared on LinkedIn

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