The steps involved in Strut modeling are as follows:
- Find out the direction in which restriction of movement is required (Assume X direction) and location of the strut installation. For reducing thermal loads to be carried by rigid struts it is preferable to choose thermal null points if feasible.
- Double click on restraints check box in Caesar spreadsheet and model restraint X with 0 mm gap and with no friction. Keep stiffness K1 box blank.
- Run Caesar Analysis and found out the force in that node.
- Enter into any catalogue (like C&P, Lisega etc) and select appropriate rigid strut depending on that force (For your reference strut selection table has been reproduced in Fig. 1 from C&P Catalogue).
- Obtain the stiffness value for the strut from the catalogue and enter this value in restraint stiffness (K1) which u left blank in initial stage.
- Run the analysis to obtain results.
Fig. 1: Strut Selection Table from C&P Catalogue.
Rigid Struts are used in Turbine and Compressor connected lines near the nozzle connections to take the advantage of very less friction. Otherwise struts can be used as a substitute for guide supports where structure is not available for using standard guides.
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