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Analysis of complex hydraulic networks, electric circuits, electronic schemes, chemical processes etc. often results in a system of interconnected di erential and algebraic equations. If the process under study has after-e ect, then the system includes integral equations. This paper addresses simulation of hydraulic networks by means of the theory for singular systems of integral di erential equations. We present theoretical tools that help investigate qualitative properties of such systems and search for e ective methods of solution. A mathematical model for the straight through boiler circuit has been developed and a numerical method for its solution has been constructed. Experimental results showed that the theory for singular systems of integral di erential equations performs well when applied to simulation of the hydraulic networks.

Investigation of the Unsteady-State Hydraulic Networks by Means of Singular Systems of Integral Differential Equations