Let’s analyze the vibration spectrum of a water pump. What do the peaks at high frequencies 400 and 450 mean?

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Bearing frequencies: NU 2217 ECM Input parameters ni Rotational speed of the inner ring 1500 r/min Result fi Rotational frequency of the inner ring 25.0 Hz fe Rotational frequency of the outer ring 0.0 Hz fc Rotational frequency of the rolling element and cage assembly 10.601265822784809 Hz fr Rotational frequency of a rolling element about its own a* s 80.39293248945147 Hz fip Over-rolling frequency of one point on the inner ring 244.77848101265823 Hz fep Over-rolling frequency of one point on the outer ring 180.22151898734177 Hz frp Over-rolling frequency of one point on a rolling element 160.78586497890294 Hz B Bearing frequencies : 6314 frInput parameters ni Rotational speed of the inner ring 1500 r/min ne Rotational speed of the outer ring (only used to calculate the bearing frequencies) 0 r/min Result fi Rotational frequency of the inner ring 25.0 Hz fe Rotational frequency of the outer ring 0.0 Hz fc Rotational frequency of the rolling element and cage assembly 9.613636363636363 Hz fr Rotational frequency of a rolling element about its own a * s 51.2474946313529 Hz fip Over-rolling frequency of one point on the inner ring 123.0909090909091 Hz fep Over-rolling frequency of one point on the outer ring 76.9090909090909 Hz frp Over-rolling frequency of one point on a rolling element 102.4949892627058 Hz