Method for forecasting and evaluating environmental noise of outdoor field of offshore equipment

The invention provides a method for forecasting and evaluating outdoor field environmental noise of offshore equipment, which comprises the following steps of: constructing a finite element geometric model of a hull structure of the offshore equipment according to an arrangement diagram and a structure diagram of the offshore equipment, and establishing a mapping surface position for reflecting outdoor field environmental noise distribution in the finite element geometric model; creating a statistical energy analysis model based on the finite element geometric model; the method comprises the steps of generating an outdoor noise mapping surface represented by a finite element structure based on a mapping surface position, loading a sound source at a corresponding position of a statistical energy analysis model according to design information of sound source equipment of offshore equipment, and defining a sound ray tracking connection relation among the sound source, a ship body structure and the outdoor noise