Calculation of pipeline branches with considering nonlinearity of elastic base T. K. Ostonov, Sh. N. Shukurov, N. Naxalboyev, N. Jalilov, Z. Jurayeva and S.T. Erkinov E3S Web of Conf., 410 (2023) 05027 Published online: 09 August 2023 DOI: 10.1051/e3sconf/202341005027