MEC E 514 Reliability for Design

1
MEC E 514 Reliability for Design
Lecture 11 Case Studies of Reliability
OptimizationReliability SoftwareNovember 15,
2006Instructor Zhigang TianDepartment of
Mechanical EngineeringUniversity of
Albertahttp//www.ualberta.ca/ztian/MECE514.htm
2
Todays Agenda

• Case Studies of Reliability Optimization
• Reliability Software

• PWR coolant system
• Design of a gas pipe line (Optimal Reliability
  Design, Kuo et al, 2001)

• Weibull
• BlockSim

3
Objectives of the Case Studies

• Learn how to analyze and address more complex
  problems

• Analyze the system
• Identify design variables (options)
• Determine the reliability and cost
• Optimal design
• Analyze the optimization results

4
Pressurized Water Reactor (PWR) Coolant System
5
Pressurized Water Reactor (PWR) Coolant System
6
Design Variables

• Number of loops n
• Redundancies of the voting pump and components in
  each loop

7
Reliability and Cost Evaluation

• Reliabilities of individual components are given
• System Reliability decomposition method
• Detailed cost analysis

8
System Reliability Optimization Model
9
Optimization Results Analysis
10
Results for Different Reliability Requirements

• Observation always have 2 loops and 1 generator.
  

11
Design of a Gas Pipeline

• To install gas pumps for a new 1200 miles
  pipeline
• Each pump can pump gas for 35 miles
• Gas pumps are installed every 30 miles
• Design (1) choose a company, (2) pump
  redundancies.

12
Reliability and Cost Evaluation

• Cost
• System Reliability series-parallel system (40
  subsystems)
• Component reliability

13
System Reliability Optimization Model
14
Optimization Results Analysis

• Company A- 2 pumps for 7 stations, and 3 pumps
  for other 33 stations. - Cost 45.2 M
• Company B- 2 pumps for 12 stations, and 3
  pumps for other 28 stations. - Cost 43.2 M
• Purchase pumps from company B.

15
Other Design Options 2-out-of-80F System
16
Todays Agenda

• Case Studies of Reliability Optimization
• Reliability Software

• PWR coolant system
• Design of a gas pipe line

• Weibull
• BlockSim

17
Reliability Software

• Customers
• Aerospace, Airlines, Automotive, Chemical
  Process, Oil Gas, Electronics/Appliances,
  Medical/Healthcare, Telecommunications,
  Semiconductor, IT Hardware, etc.

18
Objectives

• Perspective Commercial software Bridge theory
  (research) and real world applications.
• Reliability software is designed to address
  complex real world problems.
• 1. What options (flexibilities) does reliability
  software provide to address real problems? (What
  do the problems, methods, solutions look like?)
• 2. How to use reliability software to address
  common reliability problems?

19
Weibull

• Reliability Life Data Analysis.
• We will focus on reliability analysis with
  different types of data.
• Example 1 Complete failure data
• Example 2 Complete and right censored data
  (suspensions)
• Example 3 Interval data
• Example 4 All types of data

20
Example 1 Complete failure data

• A series system with three resistors
• Create a new project
• Weibull interface
• Input failure data
• Analysis setting
• Calculate the parameters
• Plot Probability, Reliability, PDF, FR, F/S
  timeline
• Quick Calculation Pad (QCP)
• Try other distributions

21
Example 2 Complete and Right Censored Data
(Suspensions)

• Create new project
• Input data
• Analysis setting
• Calculate the parameters
• Plot probability, PDF

22
Example 3 Interval data

• Create new project
• Input data
• Analysis setting MLE
• Calculate the parameters
• Plot probability, PDF, 3D Likelihood Function
  Surface.

23
Example 4 All types of data
24
Features of Weibull

• Reliability Life Data Analysis.
• All Types of Data.
• All Major Lifetime Distributions.
• Presentation of the results calculations,
  graphics, reports.
• Other analyses warranty, degradation, etc.

25
BlockSim

• System Reliability Analysis (RBD FTA)
• Example 1 Series system
• Example 2 Series-parallel system
• Example 3 Bridge system
• Example 4 k-out-of-n system
• Example 5 Mixed Standby system

26
Example 1 Series system
27
Example 2 Series-parallel system
28
Example 3 Bridge system
29
Example 4 k-out-of-n system
30
Example 5 Mixed Standby system
31
Features of BlockSim

• System Reliability Analysis.
• Reliability Block Diagram
• Fault Tree Analysis
• Repairable Systems Maintenance

32
Comments

• You can actually use them in your course
  projects. (figure out how to use them)
• Learn more about the software yourself -
  Software Help- Training Guides
  http//www.reliasoft.com/K_Base/papers.htm-
  E-books http//www.weibull.com/LifeDataWeb/lifed
  ataweb.htmhttp//www.weibull.com/SystemRelWeb/blo
  cksimtheory.htm