In cases of angular misalignment, what will the spectrum display in the axial direction?

In situations involving angular misalignment, the spectrum typically reveals a distinct characteristic: a high amplitude peak at the fundamental rotational frequency, referred to as 1x. This is because angular misalignment introduces periodic forces that are directly related to the shaft’s rotational speed, leading to increased vibration energy at this specific frequency.

When two rotating components exhibit angular misalignment, the resultant forces exerted on the bearings and housing generate vibrations at the rotational frequency. As the system oscillates at this frequency, it results in a prominent peak at 1x in the vibration spectrum, indicating the presence of misalignment.

The other potential responses do not accurately describe the typical outcome of angular misalignment. For instance, several low amplitude peaks or a balanced spectrum would not represent the clear and significant oscillation energy associated with this type of misalignment. Additionally, the presence of high amplitude peaks at 2x and 3x is more indicative of other issues, such as unbalance or certain resonance phenomena, rather than angular misalignment itself. Thus, the interpretation of the spectrum under conditions of angular misalignment convincingly aligns with a high amplitude peak at 1x.