Piping forces

In contrast to the flexibiUty method, the stiffness method considers the displacements as unknown quantities in constmcting the overall stiffness matrix (K). The force vector T is first calculated for each load case, then equation 20 is solved for the displacement D. Thermal effects, deadweight, and support displacement loads are converted to an equivalent force vector in T. Internal pipe forces and stresses are then calculated by applying the displacement vector [D] to the individual element stiffness matrices. 

Initial unbalance Rotor bow Lost rotor parts Casing distortion Foundation distortion Misalignment Piping forces... 

The large flow and small case do make the compressor somewhat more sensitive to piping forces and moments. 

A second radial (Y-axis) measurement point should be positioned at 90° to the primary in a plane that captures secondary shaft deflection. For the pump illustrated in Figure 44.21, the secondary (Y-axis) radial measurement point is located on top of the pump s bearing cap and oriented downward. Since the pump has a clockwise rotation, back-pressure in the discharge piping forces the shaft both downward and horizontally toward the front of the picture. 

Manufacturer to give al owabie piping forces S moments on nozzi s on separate sheet. ... 

O Manufacturer to give allowable piping forces i mom ents on nozzles on [Pg.747]

Manufacturer to give ai owabie piping forces mom ents Oh noial 5 on separate Sheet. ... 

CLM.IO PIPE FORCE REQUIREMENT 57 A linear momentum balance in the vertical direction results in... 

Piping design studies— study of piping forces to obtain points of maximum stress proper location of pipe supports (Chap. 9). 

---