Radial Variability of Ultrasonic Wave Velocity Across the Grain in Scots Pine (Pinus sylvestris L.) Wood
https://doi.org/10.21266/2079-4304.2026.258.367-378
Abstract
This study presents the results of investigating the variability of ultrasonic wave propagation velocity in Scots pine (Pinus sylvestris L.) wood across the grain along the radial direction of the stem. The research was conducted on 23 specimens cut from pithcentered boards. Ultrasonic wave velocity was measured using the Pulsar 2.2 device, equipped with transducers operating at a nominal frequency of 60 kHz, by applying the through-transmission method. The results demonstrated that the ultrasonic velocity ranged between 1262 and 2149 m/s, with the highest values observed in the pith zone and the lowest values near the tangential directions of the grain. A combined exponential–linear regression model was developed to describe the radial distribution of ultrasonic velocity, achieving high accuracy (R² = 0.92). Comparison of the obtained data with previous studies confirmed the consistency of the velocity ranges measured both in wood specimens and in standing trees. The increased velocity in the pith region is attributed to the anatomical characteristics of juvenile wood and the radially oriented anisotropy of the material.
About the Authors
A. S. Korolev
Volga State University of Technology
Russian Federation
Russian Federation
KOROLEV Aleksandr S. – PhD (Technical), Senior Researcher, Department of Scientific and International Activities, Associate Professor, Department of Building Structures and Water Supply
424000. Lenina sq. 3. Yoshkar-Ola
E. S. Sharapov
Volga State University of Technology
Russian Federation
Russian Federation
SHARAPOV Evgeniy S. – DSc (Technical), Professor, Department of Building Structures and Water Supply, Associate Professor
424000. Lenina sq. 3. Yoshkar-Ola
O. S. Egoshin
Volga State University of Technology
Russian Federation
Russian Federation
EGOSHIN Oleg S. – PhD student, Department of Building Structures and Water Supply
424000. Lenina sq. 3. Yoshkar-Ola
A. O. Bykov
Volga State University of Technology
Russian Federation
Russian Federation
BYKOV Anton O. – master’s student, Department of Building Structures and Water Supply
424000. Lenina sq. 3. Yoshkar-Ola
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Review
For citations:
Korolev A.S., Sharapov E.S., Egoshin O.S., Bykov A.O. Radial Variability of Ultrasonic Wave Velocity Across the Grain in Scots Pine (Pinus sylvestris L.) Wood. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2026;(258):367-378. (In Russ.) https://doi.org/10.21266/2079-4304.2026.258.367-378
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