cad design in modern day products

8/11/2019 CAD Design in Modern Day Products

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CAD Design In Modern DayProducts

Warren R. Ross

Director, Naval Architecture

And Marine Engineering


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CAD Design in Modern Day Products

Challenge to Systems Engineers

Meet the Operational Requirements of a Project

Conducting Conceptual Analysis of Alternatives

Allocation of Top Level Requirements

Conducting Trade Off Studies

Balancing Cost, Schedule and Performance


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Why CAD Systems?


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EVOLUTION OF CALCULATIONS

Hand Calculations

Written Calculations

Mechanical Calculator

Electronic Calculator

Personal Computer or Mainframe


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EVOLUTION OF CALCULATIONS AT A GROCERY STORE

Hand Addition

Cash Register

Electronic Swipe Out


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Engineer Drawings

Artist Sketch

Drafting Room

CAD


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Its the Natural Course of Evolution


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Background and History of CAD Systems

CAD Computer Aided Design

1963 Ivan Sutherland at MIT Developed SKETCHPAD

Allowed the Designer to Interact With the ComputerGraphically

First Commercial Applications of CAD Were LargeCompanies in Automotive and Aerospace Industries

Advances in Computer Technology Have AllowedSkillful Applications of Computers in Design Activities

CAD is No Longer Limited to Drafting

CAD Ventures into Intellectual Areas of a DesignersExpertise


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AutoCAD

Bentley Systems CADDS5

Cadkey

CATIA

EDS Euclid

i-DEAS

List of CAD Companies and Software

Inventor

Intergraph Matricus

ME

Pro/Engineer

Qcad Solid Edge

Solid Works

Think3

Unigraphs

VariCAD Vectorworks

AutoCAD

Caddie

Microstation


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Avanti (Merged into Synopsys) Cadence Design Systems, Inc.

IC-Ed

Mentor Graphics

MyCad

Electronic Design Automation (EDA)

Umbrella Term for Computer-Aided Design andComputer-Aided Manufacturing of Electronics

Moores LAW

Stable-Soft Silvaco

Synopsys

Tanner Research

Hewlett Packard

Electronic Design Automation (EDA) Companiesand Software


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Moores LAW

Technology Development Complexity and Advances

in the Semiconductor Industry for Integrated CircuitsDoubles Every 18 Months

Equates to Performance Improvement of 1% Per

Week

Bottom Line

Product Improvements Occur at a Fast Pace


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Terminology

Wire Frame Model is an Electronic Representation of

a 3-Dimensional Physical Object It is Created by Specifying Each Edge of the Physical Object

It is Created by Connecting an Objects Constituent Vertices

Using Straight or Curved Lines


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Terminology

Solid Modeling

Models of Solid Objects Suitable for Computer Processing Sometimes Referred to as Volume Modeling


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Advantages of a CAD System

Ability to Composite or Interface Check 3D Systems

Lends Itself to Evaluate the Design

Acts as a Prototype Accurate

Permanent Record

Repeatability, Copy or Redraw Rapidly

Transportable Electronically


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Advantages of a CAD System

Reduce Storage

Standardize Formats

Standardize Material Standardized Components

Allows Human Engineering Studies

Allows Trade-off Studies

Make Changes Easily

Facilitates Checking


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Disadvantages of a CAD System

High Initial Capital Cost

Extensive Training

Continued Development Cost of Software Continued Development Cost of Hardware

Special Real Estate Considerations

HVAC

Lighting Arrangements

High Cost to Expand Capabilities


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Project Time

CostofDesign

Change


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MORAL OF THE STORY

Make Changes as Early as Possible

Reduces Design Development Cost


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Applications of a CAD System

Interface With Manufacturing and Drive the Process

Ability to Interface With Purchasing Automatically

Allows for Planning Electronically

Logistics Support and Life Cycle Management

Technical Manual Development

Integrate With Engineering Analysis

Database for Weight Control

Ability to Interface With Vendor Data

Facilitates the Use of Integrated Product Teams


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Sheet Metal

Pipe Bending

Structural Cutting

Welding


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Sheet Metal

Detail DesignAutomatic

Generation of Parts

for Flat Pattern

Loaded IntoMainframe for Future

Shop Download

Sheet Metal

Shop

Download

Plotter Shop

Nested Parts

Wiedematic

Plasma

Machines

Finished

Part


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Structural Cutting


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Welding (Robotics)


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Input Data to Catalog Material

Catalog

Delta Change Process

Catalog Transactions

nightly update

CAD

Issue

Purchase

Order

Issue Purchase

Requisition

Manual/Electronic

Process



Ability to Interface With Purchasing Automatically


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Logistics Support and Life Cycle Management


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Technical Manual Development


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ANSYS

NASTRAN

PATRAN

ABAQUS

LS-DYNA

DYNA3D

LUSAS

FRANC 2D&3D

Common Finite Element Analysis Programs

FEMAP

FEMLAB

i-DEAS

ALGOR

NE NASTRAN

TRIFLEX

SIMSMART

STAAD.PRO


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Computer Aided Structural Analysis

Stress

Shock

Vibration

Thermal Stress


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Stress, Shock and Vibration


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Thermal Stress


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Thermal Stress Analysis


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40.7 ksi

44 ksi

37.5 ksi

33 ksi

37 ksi


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41 ksi

40 ksi


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36 ksi


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Applications a CAD System

Computer Aided Pipe Flow


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Electrical Load Analysis


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Computer Aided Pipe Flexibility


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Computer Aided Pipe FlexibilityThermal Effect


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Computer Aided Pipe FlexibilityThermal Pressure and Weight


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Computer Aided Pipe Flexibility

Vibration


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Extract Entity AttributesCenter of Gravity, Area,

Lengths

CAD

Weight Reporting

DatabaseMain Frame

Weight DatabaseDescription, Unit

Weight, Weight Class


Applications of a CAD SystemWeight


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Ability to Interface with Vendor Data


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Facilitates the Use of Integrated Product Teams


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LESSONS LEARNED

Choose a fully Developed CAD System for aProject

Anticipate Significant Cost to Tailor a CAD Systemto your application

Use a Proven CAD System

Allow Significant Time for Design Development


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CONTUSIONS

3D CAD Lends Itself to Complicated Designs

2D CAD Lends Itself to Less Complicated Designs


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CAD D i i M d D P d t


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Material

TOTALLY

INTEGRATED

CAD SYSTEM

Engineering

Marketing

Planning

Production

Research

and

Development

Customers

Suppliers

What Does the Future Bring?



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Project Time

CostofDe

sign

Change



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PAY ME NOW

ORPAY ME LATER

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