Finite Element Analysis for Complex Structures (Helicopter Transmission Housing Structural Modeling).

摘要

The objective of the Finite Element Analysis for Complex Structures program was to develop and demonstrate a comprehensive, finite element analytical technique with the capability and flexibility for analyzing helicopter transmission housings made of metal and/or composite materials. The work encompassed the study of thermal distortion and stress stress, and deflection due to static and dynamic loads, load path definition, dynamic response and the control of structural energy distribution. The results were used to optimize strength and weight, and to assess operational housing life, failsafety/safe life, and reliability. Some emphasis was placed on heat transfer analyses. Additional objectives were to integrate this housing analysis method with existing methods to form a comprehensive transmission analysis, and to validate these design tools so that they might be applied to future transmission configurations. A finite element model and analytical methods were applied to analyze a CH-47C helicopter's forward rotor transmission and also to define design modifications for structural optimization.