WOA Optimization Of Aero-engine Pipe Layout Considering Constraint Of L-bracket Clamps

Pipe system of complex equipment such as aero-engine is very complex,so it is very important to optimal and design pipe laying.according to engineering rules,most of the pipe layout is to consider the pipe layout alone first,Then rely on expert experience to arrange the clamp,Since there is an assembly constraint relation between them and they influence each other,This leads to modify over and over again,therefore,pipe and clamp are considered as a whole to consider pipe layout in this paper.For the solution of this problem,the following research is done:Firstly,CAD modeling,mathematical modeling and information acquisition and preservation are carried out for the laying space of pipe layout.Taking the commonly used L-bracket clamp for example,the parameter model of the clamp is established.It’s layout not only considered the assembly constraint relation with the engine mounting edge,but also considered the pose transformation and assembly relation with the pipe layout.In order to solve the optimization problem of automatic pipe layout based on clamp fixation,Swarm intelligence algorithm-whale algorithm is used to optimization,In order to improve the diversified performance of initialization of whale algorithm,Adding into Sine chaotic mapping to further improve the convergence factor,Moreover,tabu search mechanism is used to improve its ability to jump out of local optimal solution.Under the premise of considering the clamp constraint,Based on Sine Tabu search-whale Optimization Algorithm STS-WOA（Sine Tabu search-whale Optimization Algorithm）,Two optimal design methods of engine pipe-clamp layout are proposed: STS-WOA optimization method for pipe-clamp serial layout and STS-WOA optimization method for pipe-clamp parallel layout.Expert experience in the simulation of pipe-clamp serial layout method,which mainly includes three parts: pipe pre-layout,clamp layout,and pipe optimization and adjustment based on clamp.First,the STS-WOA algorithm was used to pre-layout the pipe,the distribution position and rotation Angle of the clamp can be automatically calculated according to the distribution pipe path results.Finally,the STS-WOA algorithm was applied to optimize and adjust the pipe layout,and finally the pipe-clamp layout scheme was obtained.The STS-WOA optimization of the parallel layout of pipe L-bracket clamps is to automatically optimize both the pipe and the L-bracket clamps simultaneously.Taking the elongated length of the starting point and end point of the pipe,the node information of the pipe path,the position of the clamps of the L-bracket clamps and the rotation angle as the decision variables,and the minimum total length of the pipe as the optimization objective,the improved STS-WOA optimization algorithm was applied to simultaneously analyze the pipe layout path and L-bracket clamps.In this paper,the algorithm realization software is MATLAB,and the visualization platform is Siemens NX.The information exchange between the two part is carried out through TXT document.Finally,the feasibility of the proposed method is verified by the test function examples and the simulation examples of the pipe L-bracket clamps.