Multi-objective Layout Optimization for Branch Pipe of Aero-engine Based on MOPSO

doi:10.3901/JME.2018.19.197

Abstract

Abstract: The layout optimization of branch pipe is a NP hard problem, and the multi-objective case of which is more complex. The branch pipe routing problem is studied in the context of an aero-engine development, and a model of multi-objective routing for branch pipes is constructed based on Steiner tree, where pipe length, the number of branch points and pipeline smoothness are taken into consideration as optimal objectives. Considering the complexity of the problem, a multi-objective particle swarm optimization (MOPSO)-based layout method is designed to solve the constructed routing model. More specifically, the number and coordinates of branch points are selected as decision variables; according to the characteristic topological structure of branch pipes, a computation model of smoothness is presented, and the multi-objective evaluation is then completed by non-dominated sorting and grid density calculation; in addition, the visibility graph method and geodesic are integrated to handle routing constraints; The Pareto solution set is obtained through particle evolution. The presented routing model and method consider the cases of multiple pipe terminals, multi-objectives and obstacle-avoidance constraints. Finally, the feasibility of the proposed method is demonstrated by several numerical computations of branch pipe routing examples.

Key words: aero-engine, branch pipe, multi-objective particle swarm optimization, pipe layout

CLC Number:

LIU Qiang, MAO Li. Multi-objective Layout Optimization for Branch Pipe of Aero-engine Based on MOPSO[J]. Journal of Mechanical Engineering, 2018, 54(19): 197-203.

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