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#3072 - 06/07/05 04:58 AM SWAY STRUT
flexMen Offline
Member

Registered: 05/06/05
Posts: 32
Loc: Spain
My doubt is the following:



I need to know how to model, in CAESAR, a sway strut or mechanic restriction forming the wished angles with the Cartesian system.

My technical question is if these elements, supporting great traction loads, also work in compression.



Best Regards,

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#3073 - 06/09/05 02:10 PM Re: SWAY STRUT
Richard Ay Offline
Member

Registered: 12/13/99
Posts: 6226
Loc: Houston, Texas, USA
Modeling of sway struts is discussed in this newsletter article .
_________________________
Regards,
Richard Ay - Consultant

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#3074 - 06/09/05 02:42 PM Re: SWAY STRUT
Dave Diehl Offline
Member

Registered: 12/14/99
Posts: 2382
Loc: Houston, TX, USA
Your strut needs not run along the X, Y or Z axis. To identify your own restraint "vector", follow the vector name (typically X) with the three components that point in the direction of the restraint action. For example, to define a strut working in the horizontal (X-Z) plane and off the X axis by +30 degrees about Y simply enter as "X(0.866,0,-0.5)" or "X(1.73,0,-1)".

If you want the restraint to work only in tension, add a sign in from of the X as in "+X(0.866,0,-0.5)" or "-X(0.866,0,-0.5)". It's up to you to use the proper + or the -. The vector you are defining is the direction of unrestrained motion. (As in +Y means the pipe is free to move in the +Y direction.) I know it sounds backwards. But check the results to be sure it's working the way you want it.

Using this definition it should be evident that "+X(0.866,0,-0.5)" is the same as "-X(-0.866,0,0.5)".
_________________________
Dave Diehl

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