CUED Publications database

Estimating response bounds for uncertain frictiondamped structures

Butlin, T and Ghaderi, P and Spelman, G (2016) Estimating response bounds for uncertain frictiondamped structures. In: UNSPECIFIED pp. 4331-4345..

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Friction dampers are commonly used to reduce high amplitude vibration in a variety of contexts, for example within gas turbines. This paper applies a recently developed method for predicting response bounds and estimating the response distribution when the characteristics of the friction dampers are unknown. The approach taken is to consider the internal frictional forces as independent external forces, and formulate an optimisation problem to seek upper and lower bounds on a chosen response metric, such as displacement amplitude. The optimisation problem is subject to constraints that describe properties of the frictional nonlinearity, without needing to specify a particular constitutive law. The principle of Maximum Entropy is then applied in order to estimate a distribution of the response within these bounds. Initial results from experimental tests and numerical simulations will be shown and compared with the predicted bounds and the estimated Maximum Entropy distribution.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:26
Last Modified: 19 Jul 2018 07:19