The article considers the tasks of shaft dynamic strength analysis. In this work, we used the algorithms and capabilities of the Transient Structural analysis of the ANSYS Workbench finite element package. Simulation of the mill movement over a time of five periods of shaft rotation at an angular speed of 500 rpm was carried out. Three options for mill loading were investigated: minimum, maximum and with imbalance. Limits of shaft endurance in a symmetric cycle were determined.

The article analyzes correlation between the structure and properties of structural materials based on the composite approach. Analytical description of this correlation has been developed, it reveals the dependence of the integral strength characteristics of materials on the partial strength values of their structural components and their shares in the volume of the sample material. The results were experimentally confirmed when studying the strength of Mo–Re-based alloys.

In the heat treatment technologies of various media, the processing of high (HF) and ultrahigh (microwave) frequencies by electromagnetic field energy (EMF) may be applicable. Microwave EMF energy is widely used in industry and agriculture. The efficiency and quality of thermal microwave processing is determined by the speed and final temperature of the heating medium. In this case, the physical properties of the medium, the frequency and intensity of the electromagnetic field, as well as the method of transmitting microwave power to the object (pulsed or continuous processing) are important. In this regard, for assessing and predicting the result of microwave processing, the most important is to evaluate the magnitude and nature of the distribution of electric and magnetic fields in the treated object. The article presents the results of a theoretical analysis regarding the influence of the source frequency on the transmission efficiency of electromagnetic power during technological processing of a layer of a dielectric medium with electromagnetic field losses of high and ultrahigh frequencies. The calculated ratios for assessing the influence of the frequency of the microwave source on the efficiency of transmitting microwave power to the technological environment are obtained. It is recommended to evaluate the frequency efficiency by the magnitude of the microwave power transmitted to a certain depth. A relative efficiency coefficient of microwave power transmitted to the depth is introduced, taking into account the electrophysical properties of the medium and the parameters of the electromagnetic wave.