The reaction of a machine support to thermal loads

The interaction of heat sources in operating machines causes machining errors. Usually, the estimation of these errors, as well as the structural analysis, is performed on the basis of the superposition principle, which is inapplicable in this case according to a number of research works. The results of the study presented in this paper reveal the failure causes for this principle. The mutual influence of thermal states of various thermal sources found out in the study can explain the low accuracy provided by numerical methods. This phenomenon should be taken into account to ensure the required accuracy of calculations. Similarly, the mutual thermal influence of sources must be taken into account while conducting full-scale experiments to guarantee the validity of the results.

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