Method for reducing propellant curing residual stress by high-energy acoustic beam

A method for reducing propellant curing residual stress by a high-energy acoustic beam, comprising the following steps:

• a step S1, in which a propellant slurry is injected into a curing container so as to wait for the propellant slurry to start curing;
• a step S2, in which when the propellant slurry starts curing, a high-energy acoustic beam generator and a high-energy acoustic beam transducer are actuated to continuously emit a high-energy acoustic beam sensitive to stress and having a high-frequency and small-amplitude to the propellant slurry in the curing container to until the propellant slurry is cured to form a propellant grain, wherein the high-energy acoustic beam sensitive to stress and having high-frequency and small-amplitude makes particles of the propellant slurry more compact, improves a leveling property of a surface of the propellant slurry and facilitates escaping of air in the propellant slurry, so as to improve mechanical properties and stability of the propellant slurry, make the propellant slurry reduce or prevent forming of the internal residual stress, and eliminate the residual stress inside the propellant;
• and
• a step S3, in which the high-energy acoustic beam generator and the high-energy acoustic beam transducer are closed.