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Theory08/06/2008 | Administrator

Gaskets - M factor The initial compression force applied to a joint must serve several purposes. It must be sufficient to initially seat the gasket and flow into the imperfections on the seati [ ... ]


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Valves

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Butterfly Valves - Overview
07/06/2008 | Administrator

Butterfly Valves A Butterfly valve is an on-off valve or a shut-off valve. Butterfly valves are quarter turn valves with a straight through flow configuration. For large sizes butterfly valves offer  [ ... ]


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Materials

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Alloy 625
08/06/2008 | Administrator

Inconel Alloy 625 Piping Inconel is a registered trade name of Special Metal Alloys Corporation. Inconel alloy 625(UNS 06625/W.Nr.: 2.4856) is a nickel-chromium-molybdenum alloy with an addition of  [ ... ]


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Specials

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Expansion Joints
07/06/2008 | Administrator

Expansion Joints Expansion joints are often installed in piping and duct systems and can serve the following purpose: Compensate thermal expansion or contraction Reduce forces and moments [ ... ]


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Stress

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Modal Analysis
08/06/2008 | Administrator

Modal Analysis Modal analysis is the study of the natural characteristic of structures. Every piping system has natural characteristics. When we impose vibration on a piping system, the piping syste [ ... ]


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Modal Analysis PDF Print E-mail
Written by Administrator   
Sunday, 08 June 2008 07:18

Modal Analysis

Modal analysis is the study of the natural characteristic of structures.

Every piping system has natural characteristics. When we impose vibration on a piping system, the piping system takes deformation patterns when the vibration frequency approaches the natural frequencey of the piping system. The deformation pattern at the natural frequencies takes on variety of shapes depending on which frequency is used to excite the piping system.
The deformation patterns are referred to as mode shapes of the piping system.

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Last Updated ( Saturday, 03 January 2009 22:30 )