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Dakota Reference Manual
Version 6.15
Explore and Predict with Confidence
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Aleatory uncertain variable - Weibull
This keyword is related to the topics:
Alias: none
Argument(s): INTEGER
Default: no weibull uncertain variables
Child Keywords:
Required/Optional | Description of Group | Dakota Keyword | Dakota Keyword Description | |
---|---|---|---|---|
Required | alphas | First parameter of the Weibull distribution | ||
Required | betas | Second parameter of the Weibull distribution | ||
Optional | initial_point | Initial values for variables | ||
Optional | descriptors | Labels for the variables |
The Weibull distribution is also referred to as the Type III Smallest Extreme Value distribution. The Weibull distribution is commonly used in reliability studies to predict the lifetime of a device. It is also used to model capacity variables such as material strength.
The density function for the Weibull distribution is given by:
and