Abstract
Pipe routing and clamp layout for aeroengine are NP-hard computational problems and complex engineering design processes. Besides space constraints and engineering rules, there are assembly constraints between pipes and clamps, which usually lead to repeatedly modifications between pipe routing and clamp layout designs. In order to solve the problems of assembly constraints and design coupling between them, an integrated optimization method for pipe routing and clamp layout is proposed. To this end, the MOALO (multiobjective ant lion optimizer) algorithm is modified by introducing the levy flight strategy to improve the global search performance and convergence speed, and it is further used as a basic computation tool. The integrated optimization method takes pipe and clamp as a whole system and then solves the Pareto solution set of pipe-clamp layouts by using improved MOALO, where the pipe path, clamp position, and rotation angle are selected as decision variables and are further optimized. Inspired by engineering experience, a clamp-based pipe path mechanism considering regular nodes is established to deal with assembly constraint problem. The proposed method comprehensively considers engineering rules of pipe routing and clamp layout and realizes the overall layout optimization of pipe-clamp system while guaranteeing the assembly constraints between pipes and clamps. Finally, some numerical computations and routing examples are conducted to demonstrate the feasibility and effectiveness of the proposed method.
Highlights
The pipe system of aeroengine consists of a series of pipes fixed by clamps
In the aspect of automatic pipe routing design, many scholars have carried out extensive research and put forward a series of optimization algorithms for automatic pipe routing, such as maze algorithm [1], heuristic algorithm [2, 3], A ∗ algorithm [4], graph-based routing algorithms [5], branch pipe routing based on local twice learning probabilistic roadmap method (LTL-PRM) [6], and routing method based on intelligent optimization [7,8,9,10,11,12,13,14]
Most existing research on pipe routing and clamp layout are performed independently, and the assembly constraints and design coupling relationship between them are rarely considered, which often leads to repeated modifications
Summary
The pipe system of aeroengine consists of a series of pipes fixed by clamps. As an important part of aeroengine, the quality and efficiency of pipe routing design have an important impact on the reliability and design cycle of the whole product. Most existing research on pipe routing and clamp layout are performed independently, and the assembly constraints and design coupling relationship between them are rarely considered, which often leads to repeated modifications. Due to the assembly constraints between pipes and clamps, pipe routing and clamp layout designs are coupled with each other, which makes the design be more complex and leads to repeated modifications. The study is aimed at presenting a routing method that automatically generates pipe routing while considering clamp constraints, with respect to a series of engineering rules.
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