Increased drill bit or lower BHA inertia for reducing HFTO

A method for estimating and reducing high-frequency torsional oscillations (HFTO) during a downhole drilling operation, the method comprising:

• providing an initial BHA configuration including an initial drill bit configuration;
• estimating an HFTO propensity of the initial BHA configuration using a model, wherein the model defines the HFTO propensity as a function of parameters of a polar moment of inertia, a cutter depth of cut of a drill bit, a rotary speed of the drill bit, a rock strength of a subterranean formation, a radius of a subterranean borehole, and one or more constants, wherein the polar moment of inertia is a function of parameters including a radius of the drill bit, a body density of the drill bit, and a length of the drill bit and collar that is energized by the HFTO;
• comparing the estimated HFTO propensity with an HFTO propensity threshold;
• and
• in response to the estimated HFTO propensity exceeding the HFTO propensity threshold, using the model to select a modified drill bit or bottom hole assembly (BHA) configuration that reduces the estimated HFTO propensity to a value below the HFTO propensity threshold, wherein the selected modified drill bit or BHA configuration has an increased polar moment of inertia as compared to the initial drill bit or BHA configuration, wherein the selected modified drill bit has a gauge diameter between 6.75 inches and 12 inches and the increased polar moment of inertia is greater than 102 lb*in2.