The Energy Flow Analysis as a Tool for Identification of Damping in Tall Buildings Subjected to Wind: Contributions of the Foundation and the Building Structure

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
S. S. Gómez ◽  
A. V. Metrikine
Keyword(s):  
Energy Dissipation ◽  
Energy Flow ◽  
Flow Analysis ◽  
Tall Buildings ◽  
Specific Domain ◽  
Energy Flow Analysis ◽  
Modal Damping ◽  
Modes Of Vibration ◽  
Energy Dissipated ◽  
Half Power

In this paper, the energy dissipated in a tall building is identified by means of the energy flow analysis. This approach allows assessing energy dissipation within a specific domain or element of the structure. In this work, the focus is placed on the superstructure, which is the part of the building above the ground, and on the foundation. Damping operators for the superstructure and the foundation are formulated based on the identified energy dissipation in these parts of the building. The obtained damping operators are used to compute the modal damping ratios in a simplified model of the building. The modal damping ratios of the three lowest modes of vibration are compared to those identified in full-scale measurements by means of the half-power bandwidth method.

Identification of Energy Dissipation in Structural Joints by Means of the Energy Flow Analysis

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
S. S. Gómez ◽  
A. Metrikine ◽  
B. Carboni ◽  
W. Lacarbonara
Keyword(s):  
Experimental Data ◽  
Energy Dissipation ◽  
Energy Flow ◽  
Degrees Of Freedom ◽  
Flow Analysis ◽  
Low Frequency ◽  
Frequency Range ◽  
Energy Flow Analysis ◽  
Damping Matrix ◽  
Good Agreement

In this paper, identification of energy dissipation in the joints of a lab-scale structure is accomplished. The identification is carried out by means of an energy flow analysis and experimental data. The devised procedure enables to formulate an energy balance in the vicinity of the joints to obtain local energy dissipation. In this paper, a damping matrix based on the locally identified damping coefficients is formulated. The formulated damping matrix is later used in a five-degrees-of-freedom (5DOF) system for validation. The results obtained with the proposed method are in good agreement with the experimental data, especially in the low frequency range.

Energy flow analysis of straw-return agricultural modes in the Central Shaanxi Plain

2013 ◽  
Vol 20 (10) ◽  
pp. 1388-1393
Author(s):  
Bi JIANG ◽  
Fa-Qi WU ◽  
Xi-Hui WU ◽  
Ming LI ◽  
Xiao-Gang TONG
Keyword(s):  
Energy Flow ◽  
Flow Analysis ◽  
Energy Flow Analysis ◽  
Straw Return

Optimization-aided material and energy flow analysis for a low carbon industry

2017 ◽  
Vol 167 ◽  
pp. 1148-1154 ◽  
Author(s):  
Hendrik Lambrecht ◽  
Heidi Hottenroth ◽  
Tobias Schröer ◽  
Frank Schulenburg
Keyword(s):  
Energy Flow ◽  
Flow Analysis ◽  
Low Carbon ◽  
Energy Flow Analysis

Structural-Acoustic Design at High Frequency Using the Energy Finite Element Method

1995 ◽  
Author(s):  
Robert J. Bernhard ◽  
John E. Huff
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Frequency ◽  
Energy Flow ◽  
Flow Analysis ◽  
Element Formulation ◽  
Joint Models ◽  
Energy Flow Analysis ◽  
Element Method

Abstract Energy flow analysis methods, particularly as implemented using the finite element method, are useful as design techniques for high frequency structural-acoustic applications. In this paper, the derivation of energy flow analysis techniques are summarized. Particular attention is given to the specification of joint models for situations where there is a discontinuity in either geometric properties or material properties. The finite element formulation of this approach is also summarized. A case study is included to illustrate the utility of the method as a design technique.

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