Damping - Revision history

Ok at 19:37, 6 August 2010

2010-08-06T19:37:15Z

← Older revision		Revision as of 21:37, 6 August 2010
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	* '''[[damping matrix]]''' - damping matrix must be used when classical modal analysis is not applicable. This is the case of structures with [[nonclassical damping]] (for both linear and nonlinear analyses) and nonlinear systems with the damping of classical form. To account for all energy dissipating mechanism, the damping matrix should be determined from the damping ratios of the structure and not from member sizes and material damping (Chopra 2002).		* '''[[damping matrix]]''' - damping matrix must be used when classical modal analysis is not applicable. This is the case of structures with [[nonclassical damping]] (for both linear and nonlinear analyses) and nonlinear systems with the damping of classical form. To account for all energy dissipating mechanism, the damping matrix should be determined from the damping ratios of the structure and not from member sizes and material damping (Chopra 2002).
	** '''classical damping matrix''' - applicable for systems with similar damping mechanism distributed throughout the structure		** '''classical damping matrix''' - applicable for systems with similar damping mechanism distributed throughout the structure
	*** '''Rayleigh damping'''		*** '''[[Rayleigh damping]]'''
	*** '''Cauchy damping'''		*** '''Cauchy damping'''
	** '''nonclassical damping matrix''' - applicable for systems that consist of two or more parts with different level of damping, such as a soil-structure system		** '''nonclassical damping matrix''' - applicable for systems that consist of two or more parts with different level of damping, such as a soil-structure system
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	* Haym Benaroya: [http://books.google.com/books?id=FEQ0H3o-lfoC Mechanical vibration: analysis, uncertainties, and control]. 2004 p. 94		* Haym Benaroya: [http://books.google.com/books?id=FEQ0H3o-lfoC Mechanical vibration: analysis, uncertainties, and control]. 2004 p. 94
	* Anil Chopra: Dynamics of Structures, 2nd Edition, 2002, ISBN-8120321391. p. 454, section 11.3 (damping matrix)		* Anil Chopra: Dynamics of Structures, 2nd Edition, 2002, ISBN-8120321391. p. 454, section 11.3 (damping matrix)

	~~== External Links ==~~

	* [http://csi.structuralwiki.org/en/Damping Damping] at CSI Wiki

	[[Category:Damping]]		[[Category:Damping]]

	{{Traditional Analysis Methods}}		{{Traditional Analysis Methods}}

Ok: /* External Links */

2010-03-06T04:10:24Z

External Links

← Older revision		Revision as of 06:10, 6 March 2010
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	[[Category:Damping]]		[[Category:Damping]]

	{{~~Elements of~~ Analysis ~~and Design~~}}		{{Traditional Analysis Methods}}

Ok at 21:34, 5 January 2010

2010-01-05T21:34:45Z

← Older revision		Revision as of 23:34, 5 January 2010
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	== Computational models for damping ==		== Computational models for damping ==

	* modal damping ratios - applicable for linear elastic analysis of structures with [[classical damping]] that can be solved by classical modal analysis		* '''modal damping ratios''' - applicable for linear elastic analysis of structures with [[classical damping]] that can be solved by classical modal analysis
	* [[damping matrix]] - damping matrix must be used when classical modal analysis is not applicable. This is the case of structures with [[nonclassical damping]] (for both linear and nonlinear analyses) and nonlinear systems with the damping of classical form. To account for all energy dissipating mechanism, the damping matrix should be determined from the damping ratios of the structure and not from member sizes and material damping (Chopra 2002).		* '''[[damping matrix]]''' - damping matrix must be used when classical modal analysis is not applicable. This is the case of structures with [[nonclassical damping]] (for both linear and nonlinear analyses) and nonlinear systems with the damping of classical form. To account for all energy dissipating mechanism, the damping matrix should be determined from the damping ratios of the structure and not from member sizes and material damping (Chopra 2002).
	** classical damping matrix - applicable for systems with similar damping mechanism distributed throughout the structure		** '''classical damping matrix''' - applicable for systems with similar damping mechanism distributed throughout the structure
	*** Rayleigh damping		*** '''Rayleigh damping'''
	*** Cauchy damping		*** '''Cauchy damping'''
	** nonclassical damping matrix - applicable for systems that consist of two or more parts with different level of damping, such as a soil-structure system		** '''nonclassical damping matrix''' - applicable for systems that consist of two or more parts with different level of damping, such as a soil-structure system

	== References ==		== References ==

Ok at 21:02, 5 January 2010

2010-01-05T21:02:10Z

← Older revision		Revision as of 23:02, 5 January 2010
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	* modal damping ratios - applicable for linear elastic analysis of structures with [[classical damping]] that can be solved by classical modal analysis		* modal damping ratios - applicable for linear elastic analysis of structures with [[classical damping]] that can be solved by classical modal analysis
	* [[damping matrix]]		* [[damping matrix]] - damping matrix must be used when classical modal analysis is not applicable. This is the case of structures with [[nonclassical damping]] (for both linear and nonlinear analyses) and nonlinear systems with the damping of classical form. To account for all energy dissipating mechanism, the damping matrix should be determined from the damping ratios of the structure and not from member sizes and material damping (Chopra 2002).
	** classical damping matrix - applicable for systems with similar damping mechanism distributed throughout the structure		** classical damping matrix - applicable for systems with similar damping mechanism distributed throughout the structure
	*** Rayleigh damping		*** Rayleigh damping
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	* Haym Benaroya: [http://books.google.com/books?id=FEQ0H3o-lfoC Mechanical vibration: analysis, uncertainties, and control]. 2004 p. 94		* Haym Benaroya: [http://books.google.com/books?id=FEQ0H3o-lfoC Mechanical vibration: analysis, uncertainties, and control]. 2004 p. 94
			* Anil Chopra: Dynamics of Structures, 2nd Edition, 2002, ISBN-8120321391. p. 454, section 11.3 (damping matrix)

	== External Links ==		== External Links ==

Ok: /* Computational models for damping */

2010-01-05T20:53:08Z

Computational models for damping

← Older revision		Revision as of 22:53, 5 January 2010
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	== Computational models for damping ==		== Computational models for damping ==

	* modal damping		* modal damping ratios - applicable for linear elastic analysis of structures with [[classical damping]] that can be solved by classical modal analysis
	* Rayleigh damping		* [[damping matrix]]
			** classical damping matrix - applicable for systems with similar damping mechanism distributed throughout the structure
			*** Rayleigh damping
			*** Cauchy damping
			** nonclassical damping matrix - applicable for systems that consist of two or more parts with different level of damping, such as a soil-structure system

	== References ==		== References ==

Ok at 20:36, 5 January 2010

2010-01-05T20:36:09Z

← Older revision		Revision as of 22:36, 5 January 2010
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	[[Category:Damping]]		[[Category:Damping]]

			{{Elements of Analysis and Design}}

Ok at 19:51, 4 January 2010

2010-01-04T19:51:42Z

← Older revision		Revision as of 21:51, 4 January 2010
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	Damping is defined as energy dissipation property of materials and structures that are subjected to time-variable loading. Damping is associated with irreversible transition of mechanical energy into thermal energy. Energy radiation into a surrounding medium is called radiation or geometric damping.		Damping is defined as energy dissipation property of materials and structures that are subjected to time-variable loading. Damping is associated with irreversible transition of mechanical energy into thermal energy. Energy radiation into a surrounding medium is called radiation or geometric damping (Benaroya 2004).

	== Damping classification ==		== Damping classification ==

Ok at 19:51, 4 January 2010

2010-01-04T19:51:03Z

@@ Line 1: / Line 1: @@
-Topics:
+Damping is defined as energy dissipation property of materials  and structures that are subjected to time-variable loading. Damping is associated with irreversible transition of mechanical energy into thermal energy. Energy radiation into a surrounding medium is called radiation or geometric damping.
 * modal damping
 * Rayleigh damping
 == External Links ==

Ok at 18:23, 4 January 2010

2010-01-04T18:23:34Z

← Older revision		Revision as of 20:23, 4 January 2010
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	* modal damping		* modal damping
	* Rayleigh damping		* Rayleigh damping

			== External Links ==

			* [http://csi.structuralwiki.org/en/Damping Damping] at CSI Wiki

	[[Category:Damping]]		[[Category:Damping]]

Ok at 17:27, 13 May 2009

2009-05-13T17:27:39Z

← Older revision		Revision as of 19:27, 13 May 2009
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	Topics:		Topics:

			* material damping
	* modal damping		* modal damping
	* Rayleigh damping		* Rayleigh damping

	[[Category:Damping]]		[[Category:Damping]]