The Boeing Company
Case Study 3 - Assembly Access

BHMS Provides for Analysis of Assembly Tasks
Assembler Accessibility into Wing Box

BHMS is a tool designed specifically for engineering applications. BHMS has been used to simulate and analyze many manufacturing and assembly operations. Structure, systems and assembly `build-up' procedures can be evaluated to determine if the assembly task is feasible. For example, one feasibility study examined assembler access of a wing box using BHMS.

  1. The electronic (CAD) representation of the wing box was read into BHMS. 
  2. A manikin representative of the 95th percentile (stature and shoulder breadth) male assembler was generated from the appropriate anthropometric database using BHMS' manikin generation feature. An individual manikin can be generated from as little as one input dimension with BHMS' Multivariate Estimator. 
  3. The manikin was positioned to simulate entry into the wing box through an access hole. Analysis indicated that the assembler could crawl through the access hole. Once inside the wing box, however, mobility would be difficult for this size individual due to restriction of space between the upper and lower stringers. Also, the width of the bay limits the full range of motion of the assembler's arm. 
BHMS application indicated that while the assembly task was feasible, a large (95th percentile stature and shoulder breadth) male would have more difficulty performing the task than a smaller individual. 

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