How do I calculate the deflection of an L-shaped pipeline with added loads?

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Discussion Overview

The discussion revolves around calculating the deflection of an L-shaped pipeline under various loading conditions, including the weight of the pipe and additional downward loads. Participants explore different factors that may influence deflection, such as the contents of the pipe and the configuration of the structure.

Discussion Character

  • Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant inquires about calculating deflection considering the weight of the pipe and additional loads, questioning whether the weight can be treated as a distributed load.
  • Another participant raises the complexity of analyzing the elbow in the pipeline, suggesting that various factors such as the contents of the pipe (water, coal tar pitch, or empty) could affect deflection.
  • A participant confirms that the weight of the pipe can be treated as a distributed load, while the flange may be treated as a point load.
  • One suggestion is made to use an energy approach, specifically Castigliano's theorem, to analyze the deflection.

Areas of Agreement / Disagreement

Participants express varying views on the factors affecting deflection, with no consensus on the best approach or the impact of different loading conditions. The discussion remains unresolved regarding the specific calculations and methodologies to apply.

Contextual Notes

Participants have not fully defined the assumptions regarding the loading conditions or the specific configurations of the pipeline, which may influence the analysis.

albertseng
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Hello,

Uncle have one question.
How to calculate the deflection of the upper flange if the pipe configuration is like the attached picture. How to include the weight of the pipe, can I assume it as the distribution load? And what if there is another load acting downward at the middle of the upper side.

Wollong_House_Pipe_Arrangement.jpg
 
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deflection due to weight? Or heat? what? Full of water? Full of coal tar pitch? Half full?

The most difficult part will be the analysis of the elbow.
 
Hi Travis_King,

Let say I have an empty pipe. So the deflection is just due to the weight of pipe and and the flange, right?.
 
Yep, the weight of the pipe can be considered a distributed load. The flange may be considered a point load.
 
An energy approach (Castigliano) may be your best bet here.
 

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