1967-1972 - Student at Samarkand State University
1972-1974 - Mathematics teacher in 68 secondary schools in the Nurata region
1974-1976 - Mathematics teacher of 83 secondary schools in the Nurata region
1976-1979 - Assistant at Samarkand State Institute of Architecture and Construction
1979-1982 - Postgraduate student at Tashkent Polytechnic Institute
1982-1987 - Assistant at Samarkand State Institute of Architecture and Construction
1988-1989 - Senior Lecturer at Samarkand State Institute of Architecture and Construction
1989-1991 - Junior researcher at Samarkand State Institute of Architecture and Construction
1991-1992 - Associate Professor, Professor of the Samarkand State Institute of Architecture and Construction
1992-1995 - Professor of the Department of Theoretical Mechanics of Samarkand State University
1995-2001 - Head of the Department of Theoretical and Applied Mechanics of Samarkand State University, Professor
2001-2008 - Academic Lyceum, professional colleges and vice-rector for marketing service of Samarkand State University
2008-2013 - Head of the Department of Mechanics, Samarkand State University, Professor
2013-2013 - Professor of the Department of Mechanics of Samarkand State University
2013-2015 - Professor of the Department of Applied Mathematics, Tashkent State Technical University
2015-2016 - Professor of the Department of Mathematics and Mechanics of Tashkent State Technical University
2016-2018 - Professor of the Department of Higher Mathematics at Tashkent State Technical University
2018-2024 - Head of the Department of Theoretical and Applied Mechanics of Samarkand State University, Professor
2024 - present - Head of the Department of Theoretical and Applied Mechanics of Samarkand State University, Professor

Without using simplifying hypotheses and assumptions used in some classical and refined theories of vibration, linear and unsteady interactions of circular cylindrical and conical monoelastic and layered viscoelastic structures (layers, shells and struts) with various media, theories of nonlinear physics were created, and corresponding mathematical models were developed.
Research on the dynamic calculation of structural elements in the form of layers, racks, plates and shells, which are the main load-bearing elements of various engineering objects, remains relevant. The relevance of such research in modern engineering practice is one of the most important tasks in the field of construction and mechanical engineering, which is ultimately determined by reducing the weight of structures and machines, increasing reliability and durability, as well as reducing materials and materials. costs spent on them.
The scientific novelty of the research lies in the fact that the problem of studying vibration processes of homogeneous and layered round cylindrical and conical structures was solved on the basis of solving three-dimensional problems of the theory of viscoelasticity. Including:
New mathematical models of unsteady vibrations of circular-cylindrical and conical-viscoelastic structures with a layer interacting with a viscous compressible fluid have been created.
- based on the results of solving problems associated with unsteady vibrations of circular cylindrical layered narrow-elastic structures, an algorithm has been developed that makes it possible to unambiguously determine the stress-strain state at any point of their cross section in the field of required functions;
- new methods have been created for the dynamic calculation of round-cylindrical and cone-layered viscoelastic structures interacting with a viscous fluid under the influence of various external dynamic, in particular shock and seismic loads;
The scientific significance of the research results lies in the creation and improvement of a new method for deriving equations of non-stationary, torsional and longitudinal-radial vibrations of composite layered cylindrical and conical viscoelastic structures, the development of composite layered shells under the influence of external dynamic, in particular impulse and seismic loads, due to the possibility of solving new practical problems associated with vibrations, and generalization of developed methods for structural elements of shells and other structures, in particular conical shells and pipes, shells. structures of elliptical section, plates, etc.
The practical significance of the research results lies in the development of analytical and numerical algorithms for solving practical problems of determining the parameters of the stress-strain state during torsional and longitudinal-radial vibrations of layered composite structures, taking into account external dynamic loads; taking into account rheological, anisotropic and other properties of the material is explained by the possibility of generalizing the results obtained, which are of a general nature for similar problems of mathematical physics.

"1. K.Khudoynazarov, B.F.Yalgashev and T.Mavlonov 2021 Mathematical modelling of torsional vibrations of the three-layer cylindrical viscoelastic shell. IOP Conf. Series: Mater. Sci. Eng.1030 012098 DOI: 10.1088/1757-899X/1030/1/012098.
2. Khudoynazarov, K., Yalgashev, B. 2021 Longitudinal vibrations of a cylindrical shell filled with a viscous compressible liquid. E3S Web of Conferences 264, 02017. https://doi.org/10.1051/e3sconf/202126402017
3. Khudoynazarov Kh.Kh., Khalmuradov R.I., Yalgashev B.F. 2021 Longitudinal-radial vibrations of a elastic cylindrical shell filled with a viscous compressible liquid. Tomsk State University. Journal of Mathematics and Mechanics. 69, 139-154. DOI: 10.17223/19988621/69/11.
4. R I Khalmuradov, K Khudoynazarov and S B Omonov Model for calculation of anchor parameters fixings for vertical exploration works. IOP Conf. Series: Earth and Environmental Science 937 (2021) 042092 doi:10.1088/1755-1315/937/4/042092
5. Khalmuradov, R.I., Khudoynazarov, K., Nishanov, U.A. (2022) Elastic-plastic deformation of a round plate reinforced with stiffeners. Magazine of Civil Engineering. 2022. 116(8). Article no. 11613. DOI: 10.34910/MCE.116.13
6. Khayrulla Khudoynazarov, Jamshid Abdurazakov and Dilshod Kholikov Nonlinear torsional vibrations of a circular cylindrical elastic shell, AIP Conference Proceedings, 2637, 020003 (2022); https://doi.org/10.1063/5.0118844
7. Khayrulla Khudoynazarov, Dilshod Kholikov and Jamshid Abdurazakov Torsional vibrations of a conical elastic shell, AIP Conference Proceedings, 2637, 030024 (2022); https://doi.org/10.1063/5.0118846/
8. Khayrulla Khudoynazarov International Conference on Actual Problems of Applied Mechanics (Preface), AIP Conference Proceedings, 2637, 010001 (2022); https://doi.org/10.1063/12.0013538
9. Rustam Khalmuradov, Khayrulla Khudoynazarov*, and K Isabekov Experimental stud of cross-rod spatial structures, E3S Web of Conferences 365, 02006 (2023) https://doi.org/10.1051/e3sconf/202336502006
10. Khayrulla Khudoynazarov*, A Gadayev, and Kh Akhatov Тorsional vibrations of a rotating viscoelastic rod, E3S Web of Conferences 365, 02016 (2023) https://doi.org/10.1051/e3sconf/202336502016
11. Rustam Khalmuradov, Khayrulla Khudoynazarov*, and Sh Оmonov Calculation of parameters of anchor-sprayed concrete support vertical mining operations, E3S Web of Conferences 365, 02020 (2023) https://doi.org/10.1051/e3sconf/202336502020
12. Khudoynazarov, Kh. (2023) A mathematical model of physically nonlinear torsional vibrations of a circular elastic rod. Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mekhanika – Tomsk State University Journal of Mathematics and Mechanics. 84. pp. 152–166. doi: 10.17223/19988621/84/12
13. K h u d o y n a z a r o v Kh. (2023) Modeling of nonlinear torsional vibrations of a truncated conical rod, Vestn. Samar. Gos. Tekhn. Univ., Ser. Fiz.-Mat. Nauki [J. Samara State Tech. Univ., Ser. Phys. Math. Sci.], 2023, vol. 27, no. 4, pp.1-19. EDN: AAAAAA. DOI: 10.14498/vsgtu2002 (In Russian).
14. Khayrulla Khudoynazarov. (2023) Longitudinal-radial vibrations of a viskoelastik cylindrical three-layer structure. FACTA UNIVERSITATIS Series: Mechanical Engineering, https://doi.org/10.22190/FUME231219010K"