In addition, interdependenciesbetween structures are ...
1
A. Maghareh 1* , D. Gomez 1 , S. J. Dyke 1,2 , A. Bobet 1 , J. Ramirez 1 , H. J. Melosh 3 , A. Modiriasari 1 , and A. Theinat 1 1,* Lyles School of Civil Eng., Purdue University, 2 School of Mechanical Eng., Purdue University, and 3 Department of Earth, Atmospheric, and Planetary Sciences, Purdue University The 49 th Lunar and Planetary Science Conference March 19-23, 2018 (No. 2860) RESILIENCE FOR PERMANENT EXTRATERRESTRIAL HABITATS Introduction In the context of long-term extraterrestrial habitation, safety and resilience should be given consideration early on: a planned design of habitats to consider degradation and vulnerability to disasters, and minimize disruptions affecting normal functions. In addition, interdependencies between structures are modeled based on Systems Operational Dependency Analysis [6]. Each dependency is represented with three parameters: strength of dependency (SOD), criticality of dependency (COD), and impact of dependency [6], see Figure 3. SOD accounts for how much the functionality of the structure (k) depends on the functionality of the structure (i or j). COD and IOD quantify how the functionality of the structure (k) degrades when the structure (i or j) is experiencing a failure. Here, dependencies are modeled as piecewise linear relationship, suitable to analyze various scenarios, including partial dependencies. In addition, interdependencies between structures are modeled based on Systems Operational Dependency Analysis [6]. Each dependency is represented with three parameters: strength of dependency (SOD), criticality of dependency (COD), and impact of dependency [6], see Figure 3. SOD accounts for how much the functionality of the structure (k) depends on the functionality of the structure (i or j). COD and IOD quantify how the functionality of the structure (k) degrades when the structure (i or j) is experiencing a failure. Here, dependencies are modeled as piecewise linear relationship, suitable to analyze various scenarios, including partial dependencies. changes in function or sacrifices in safety. Resilience is an umbrella under which other factors can be found: • reconfigurability • robustness • scalability • rapidity System Design Criteria … • function, as intended, under continuous disruptive conditions, such as wild temperature fluctuations, galactic cosmic rays, as well as discrete disruptive events, such as meteoroid impacts, vibrations, solar particle events, and equipment failures; and • meet design objectives under limited in-situ resources. System Resilience … Resilience is the ability of a system to adapt, absorb and recover quickly from a disruption, expected or unexpected, without fundamental We are developing a System Resilience Framework to counter these challenges and design sustainable, long-term extraterrestrial habitat systems. This framework addresses the following questions: • What can go wrong? • What is the likelihood? • What are the consequences? • What should be the level of preparedness? • What is the recovery time? Civil Engineering System interdependencies are modeled based on Systems Operational Dependency Analysis (SODA). Strength of dependency accounts for the functional dependencies of the structures. Criticality of dependency and Impact of dependency quantify the functional degradation of a structure due to failure in other structures. https://www.purdue.edu/reth/ Case Study In our framework, Probabilistic Risk Assessment (PRA) is used to obtain the probability of a major accident as a function of the probabilities of subsystem failures. Our framework considers not only the identification of potentially major accidents and their causes but also the habitat system’s • response • performance level • loss • recovery Aerospace Engineering Initial Design Analysis Evaluation Decision Design Iteration Systems Engineering System Resilience Framework Approach The civil engineering community has learned from past natural disasters and the impacts of failures driven by interdependencies among infrastructure sectors (Hurricane Katrina and Fukushima nuclear disaster). The design for structures has evolved/matured, leading to • performance-based design (PBD) • consequence-based design (CBD). System Resilience Framework Civil Engineering (CBD and PBD) Aerospace Engineering (PRA) Systems Engineering (SODA)
Transcript of In addition, interdependenciesbetween structures are ...
A. Maghareh1*, D. Gomez1, S. J. Dyke1,2, A. Bobet1, J. Ramirez1, H. J. Melosh3, A. Modiriasari1, and A. Theinat1
1,*Lyles School of Civil Eng., Purdue University, 2School of Mechanical Eng., Purdue University, and 3Department of Earth, Atmospheric, and Planetary Sciences, Purdue University
The 49th Lunar and Planetary Science Conference March 19-23, 2018 (No. 2860)
RESILIENCE FOR PERMANENT EXTRATERRESTRIAL HABITATS
IntroductionIn the context of long-term extraterrestrial habitation, safetyand resilience should be given consideration early on: aplanned design of habitats to consider degradation andvulnerability to disasters, and minimize disruptions affectingnormal functions.
In addition, interdependencies between structures are modeled based on Systems Operational Dependency Analysis [6]. Each dependency is represented with three parameters: strength of dependency (SOD), criticality of dependency (COD), and impact of dependency [6], see Figure 3. SOD accounts for how much the functionality of the structure (k) depends on the functionality of the structure (i or j). COD and IOD quantify how the functionality of the structure (k) degrades when the structure (i or j) is experiencing a failure. Here, dependencies are modeled as piecewise linear relationship, suitable to analyze various scenarios, including partial dependencies.In addition, interdependencies between structures are modeled based on Systems Operational Dependency Analysis [6]. Each dependency is represented with three parameters: strength of dependency (SOD), criticality of dependency (COD), and impact of dependency [6], see Figure 3. SOD accounts for how much the functionality of the structure (k) depends on the functionality of the structure (i or j). COD and IOD quantify how the functionality of the structure (k) degrades when the structure (i or j) is experiencing a failure. Here, dependencies are modeled as piecewise linear relationship, suitable to analyze various scenarios, including partial dependencies.
changes in function or sacrifices in safety. Resilience is anumbrella under which other factors can be found:
• reconfigurability• robustness• scalability• rapidity
System Design Criteria …• function, as intended, under continuous disruptive
conditions, such as wild temperature fluctuations, galacticcosmic rays, as well as discrete disruptive events, such asmeteoroid impacts, vibrations, solar particle events, andequipment failures; and
• meet design objectives under limited in-situ resources.
System Resilience … Resilience is the ability of a system toadapt, absorb and recover quicklyfrom a disruption, expected orunexpected, without fundamental
We are developing a System Resilience Framework tocounter these challenges and design sustainable, long-termextraterrestrial habitat systems. This framework addresses thefollowing questions:• What can go wrong?• What is the likelihood?• What are the consequences?• What should be the level of preparedness?• What is the recovery time?
Civi
l Eng
inee
ring
System interdependencies are modeled based on Systems OperationalDependency Analysis (SODA). Strength of dependency accounts for thefunctional dependencies of the structures. Criticality of dependency and Impactof dependency quantify the functional degradation of a structure due to failure inother structures.
https://www.purdue.edu/reth/
Case Study
In our framework, Probabilistic RiskAssessment (PRA) is used to obtainthe probability of a major accidentas a function of the probabilities ofsubsystem failures.
Our framework considers not onlythe identification of potentiallymajor accidents and their causes butalso the habitat system’s
• response• performance level• loss• recovery
Aero
spac
e En
gine
erin
g
Initial Design Analysis Evaluation Decision Design Iteration
Syst
ems E
ngin
eerin
gSy
stem
Res
ilien
ce F
ram
ewor
k
ApproachThe civil engineering communityhas learned from past naturaldisasters and the impacts of failuresdriven by interdependenciesamong infrastructure sectors(Hurricane Katrina and Fukushimanuclear disaster).
The design for structures hasevolved/matured, leading to• performance-based design
(PBD)• consequence-based design
(CBD).
System Resilience Framework
Civil Engineering(CBD and PBD)
AerospaceEngineering
(PRA)
Systems Engineering
(SODA)
