Hierarchical ship transmission device sketch design method

The invention belongs to the technical field of product design, and particularly relates to a hierarchical ship transmission device sketch design method. According to the method, the problem of rapid design of the transmission system is solved by using the idea of configuration design, and a design idea is provided for rapid design of the transmission system facing the topological relation model. According to the method, the transmission unit library is constructed, so that accumulation and reuse of design knowledge and experience of the transmission system are realized; a transmission system scheme can be quickly determined through dragging type topological relation modeling, and a top-down concept modeling mode is supported; the first-level modeling is based on the overall design target (power, rotating speed and the like), model constraint and the like of the transmission system for solving, the second-level modeling is based on the local design requirement transmitted to the gear box and local model const