Methods and apparatus for model based shrouded bellows stiffness determinations
First Claim
1. A computer-implemented method for predicting natural frequency responses, said method comprising the steps of:
- providing at least one tube sub-system including a plurality of shrouded bellows components;
determining a stiffness multiplier within each of the shrouded bellows components using a regression technique based on dynamic stiffness test data;
inputting the determined stiffness multiplier into a computer model that applies a standard geometry element and a flexibility factor based upon the stiffness multiplier to predict a natural frequency response; and
determining locations for duct supports based on the natural frequency response.
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Abstract
A modeling system predicts natural frequency responses in tube sub-systems including shrouded bellows components. The system determines a stiffness multiplier from input values and uses the determined flexibility factor to determine the natural frequency responses. The input values include geometry inputs and dynamic operating condition inputs. The flexibility factor is determined with a regression equation. The regression equation, based on dynamic stiffness test data of various shrouded bellows configurations, permits the system to characterize the shrouded bellows using a geometry element that includes an assigned flexibility factor based on dynamic stiffness test data.
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Citations
10 Claims
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1. A computer-implemented method for predicting natural frequency responses, said method comprising the steps of:
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providing at least one tube sub-system including a plurality of shrouded bellows components; determining a stiffness multiplier within each of the shrouded bellows components using a regression technique based on dynamic stiffness test data; inputting the determined stiffness multiplier into a computer model that applies a standard geometry element and a flexibility factor based upon the stiffness multiplier to predict a natural frequency response; and determining locations for duct supports based on the natural frequency response. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for determining natural frequency response of shrouded bellows components, said apparatus comprising a processor configured to:
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determine a stiffness multiplier within the shrouded bellows components using a regression technique based on dynamic stiffness test data; use the determined stiffness multiplier in a model that applies a standard geometry element and a flexibility factor based upon the stiffness multiplier to predict a natural frequency response of the bellows; and determine a location of a duct support based on the natural frequency response. - View Dependent Claims (7, 8, 9, 10)
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Specification