The invention belongs to the related technical field of structural optimization design, and discloses a
level set method for
optimal design of a
fiber curve laying
variable stiffness structure, whichcomprises the following steps of: firstly, setting a series of design points and field center points in a structural
design domain, constructing a
vector field, and further solving an initial
weight coefficient at each field center point; secondly, dividing a structural
design domain into limited units, constructing a
vector field according to the central points of the units and the central pointof the field, and describing the overall
fiber angle
layout by utilizing the tangential direction of a parameterized
level set function; thirdly, establishing a unit
stiffness matrix to solve an overall displacement vector and a target function value, and calculating the sensitivity of a target function about a design variable by taking a
weight coefficient as the design variable and minimizing the flexibility as a design target; and secondly, repeatedly iterating after updating the design variable until an optimization termination condition is met. According to the method, the fibers can be parallel to each other, and the situation of
fiber overlapping or gaps in the manufacturing process of the optimal structure is avoided.