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OPTIMIZED TRUSS PYLON DESIGN

IP.com Disclosure Number: IPCOM000250561D
Publication Date: 2017-Aug-03
Document File: 3 page(s) / 163K

Publishing Venue

The IP.com Prior Art Database

Abstract

The objective of this paper is to disclose an aircraft engine pylon design that is disruptive compare to classical design. It permits to have a lighter structure which is a key driver for aircraft performances, to ease access for manufacturing and maintenance, to reduce cost of a pylon that meets all the certification requirements. During the design phase, as up from the concept phase, the various key factors in the development of a pylon (mass, maintenance, cosst , ease of industrialization) are taken into account

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OPTIMIZED TRUSS PYLON DESIGN 

 

I) ABSTRACT: 

  The objective of this paper is to disclose an aircraft engine pylon design that is disruptive compare  to  classical  design.    It  permits  to  have  a  lighter  structure  which  is  a  key  driver  for  aircraft  performances, to ease access for manufacturing and maintenance, to reduce cost of a pylon that 5  meets all the certification requirements.    During  the  design  phase,  as  up  from  the  concept  phase,  the  various  key  factors  in  the  development  of  a  pylon  (mass,  maintenance,  cost  ,  ease  of  industrialization)  are  taken  into  account. 10    II) TECHNICAL PROBLEM TO BE SOLVED: 

 

A classic way to design a pylon is described in relation with the figure 1, below.  15  It is a sequential process that takes into account the different requirements one after the other. It  leads to adapt the pylon design to meet all the requirements.    The pylon, having a general shape of a closed box, includes lateral panels, spars and ribs all joined  by  fasteners.  The parts  are held  together by  fasteners  to  confer  a mechanical  strength  to  the 20  pylon. The assembly of all these parts is quite complex.      Moreover,  to  access  the  components  (interfaces)  located  inside  the  panel,  several  holes  are  drilled in the lateral sides of the box. However these holes do not have the best location & shape 25  from a structural perspective. It adds weight.     Also, due to thin wall panel of a classical design, ribs are necessary for non‐buckling requirements.  Consequently, the number of ribs  is quite high.  It adds weight,  it’s time assembly and  increases  costs. 30 

Fig 1: classic pylon design 

 

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III) SPECIFICATION: 

The idea is to construct engine pylons using truss shaped elements that forms the lateral panels of  the pylon. The truss shaped elements are then joined (via fasteners, welding, high deposition rate  additive  manufacturing  …)  to  the  other  pylons  elements.  Such  a  pylon  comprises  a  limited  numbers or parts. 5    The truss shaped element...