TY JOUR TI Selection of the Optimal Value of Cylindrical Elements in Tower Structures KW tower KW round element KW cylindrical section KW wind effect KW aerodynamic coefficient KW optimal pipe sections KW load KW lattice elements KW Reynolds number JO Proceedings of Petersburg Transport University AU Veremeev, D.V. AU Pegin, P.A. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"