Method for measuring vertical polar moment of inertia of rotary body

The invention relates to a method for measuring the vertical polar moment of inertia of a rotary body. The method specifically comprises the following steps of (1) measurement by using a moment of inertia measurement table, on which the polar moment of inertia and equatorial moment of inertia of the rotary body; (2) measurement of a swing cycle by sampling a time sequence and adopting a photoelectric timing system; (3) measurement of the moment of inertia of the rotary body by enabling the rotary body to swing freely around a specified axis when using a torsion-pendulum method for measuring the moment of inertia, measuring the swing cycle, and then calculating the moment of inertia of the rotary body based on the swing cycle; (4) measurement error analysis of the moment of inertia; and (5) influence of damping on the test result of the equatorial moment of inertia. The invention can be used for effectively measuring the vertical polar moment of inertia of the rotary body, is easy to use, improves the test result, and facilitates usage as needed.