The preservation and support of robust health and immunity for military personnel in extreme conditions during combat are among the priority tasks of the country’s military-defense complex. One of the ways to address this task is the production and consumption of high-quality functional food products. However, known technologies for processing collagen-containing meat raw materials involve a prolonged and energy-intensive preparation, which hinders the production of functional meat products in mobile equipment complexes. The use of modern ultrasonic technologies will not only successfully address these issues but also streamline and significantly reduce the cost of manufacturing most types of meat products in industrial conditions. The rational parameters of the device’s piezoelectric actuator for collagen-containing meat raw material fragmentation are substantiated in the work through numerical modelling of its operation using the COMSOL Multiphysics software complex. The maximum amplitude of the piezoelectric actuator’s vibrations corresponds to frequencies of 28 kHz, 41.2 kHz, 42.9 kHz, and 45.9 kHz. The most rational frequency is 42.9 kHz, at which more volumetric deformations of the knife occur, distributed practically over the entire blade surface. In this case, the acceleration is 1.22 × 106 m/s2, and the maximum amplitude of the piezoelectric actuator’s knife oscillations is 18.7 µm at a frequency of 41.2 kHz with a force of 15 kN. The adopted design scheme of the piezoelectric actuator is capable of ensuring effective intensification of meat collagen-containing raw material fragmentation.