The paper devoted to introducing of theory and practice results of natural ventilation and properties of external aerodynamics of orthodox churches research. The features of the movement of air flows inside the temple are considered. On the example of the Transfiguration Cathedral, the analysis of the fields of aerodynamic coefficients is introduced.

Abstract. In this article the results of theoretical and experimental studies of the reduction of heat losses in the elements of external enclosing structures of under construction, reconstructed, reconstructed and currently operated unique buildings (monuments of history and architecture) presents.

This paper deals with the photoelastic analysis of stress waves in a thick ring subjected to transient high-frequency loading. The device used to apply the loading is a piezo-electric transducer which initially produces four cycles of a 31·25 kHz toneburst. The loading pulse can be reproduced with high precision. The ring is illuminated with a flash of approximately 0·5 μs duration which can be delayed in a continuously adjustable manner. Isochromatics and isoclinics can be directly observed as static patterns. Photoelastic data are supplemented by measurements obtained with a capacitance gauge used as a dynamic lateral extensometer. Satisfactory agreement is found between tangential stresses near the free boundary of the ring determined from photoelastic data and those determined from capacitance-gauge measurements. As examples of complete determination of stress distributions, the separated principal stresses are obtained along an axis of symmetry and a vectorial representation of the principal stresses is given. A wave interpretation of the data is developed and comparisons are made with available solutions of related problems.

Abstract. The number of measures is shown in article, that allow to downsize the consumption of thermal energy in the construction, rehabilitation, reconstruction and maintenance of buildings, which are which are recognized today as monuments of history and architecture.