Reliability analysis and optimization method for rainwater pipe network nodes

The invention provides a reliability analysis and optimization method for a rainwater pipe network nodes; and the method comprises the steps: A, setting M as any node of a rainwater pipe network system, calculating the reliability of the node M, and determining a variable parameter affecting the reliability of the node M; B, selecting a variable parameter as a simulation variable parameter, keeping the numerical values of other variable parameters unchanged, randomly changing the numerical values of the simulation variable parameter, respectively calculating the reliability of the node M, anddetermining the influence of the change of the simulation variable parameter on the reliability; C, selecting the rest variable parameters as simulation variable parameters one by one, and determiningthe influence of each variable parameter on the reliability according to the step B; and D, changing the numerical value of the variable parameter, and optimizing the reliability of the node M. Afterthe reliability of the nod