For citations:
Bulgakov A.I., Manapov R.M., Muselemov Kh.M., Ustarkhanov O.M. CALCULATION OF THREE-LAYER BEAMS BY THE FINITE ELEMENT-METHOD WITH THE HELP OF LIRA PC. Herald of Dagestan State Technical University. Technical Sciences. 2016;41(2):125-132. (In Russ.) https://doi.org/10.21822/2073-6185-2016-41-2-125-132