VFS Website
  • VIEW CART
  • CUSTOMER SUPPORT
  • MY STORE ACCOUNT
  • CONTACT US
  • STORE HOME
  • 5Prime
  • Forum Proceedings
  • Workshops
  • Technical Meetings
  • Vertiflite
  • Books, CDs & Gifts


Unable to log in or get member pricing? Having trouble changing your password?

Please review our Frequently Asked Questions for complete information on these and other common situations.
 

Vertical Flight Library & Store

CHECKOUT

0 Item(s) In Cart Total: $0.00


Investigation of Engine-Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework

Stacy Sidle, Ananth Sridharan, Inderjit Chopra, Matt Feshler, Peter Kull

May 8, 2017

  • Your Path :
  • Home
  • > Investigation of Engine-Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework

Investigation of Engine-Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework

  • Presented at Forum 73
  • 17 pages
  • SKU # : 73-2017-0050
  • Your Price : $30.00
  • Join or log in to receive the member price of $15.00!


VFS member?
Don't add this to your cart just yet!
Be sure to log in first to receive the member price of $15.00!

 
Add To Cart

Add to Wish List

Reward Value:
(60) Member Points

Investigation of Engine-Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework

Authors / Details: Stacy Sidle, Ananth Sridharan, Inderjit Chopra, Matt Feshler, Peter Kull

Abstract
This paper presents a methodology to analyze the coupled structural dynamic response of an elastic airframe and engines of a helicopter in response to main rotor and tail rotor hub loads. Transfer functions of individual components (airframe, engine, mount struts and torque tube) are coupled together using a sub-structuring approach to obtain consistent coupled solutions of the entire system. Using this approach, the two-engined and four-bladed S-92 helicopter is analyzed using NASTRAN-based models of the Sikorsky airframe and GE CT7-8 engine. This ultra-efficient substructuring approach is validated against the fully coupled NASTRAN model using forced response studies. Characteristics of the mount properties, i.e., the torque tube stiffness, and aft mount stiffness and damping are systematically varied to study their effect on the engine vibration response. The fore and aft mount element properties for minimizing the 8/rev engine response are identified without increasing 4/rev response. A compromise between 4/rev and 8/rev response is also identified from parametric studies of rear mount properties, using just 3 parameters to represent the design space. Using the sub-structuring approach presented here, future studies can be performed to rapidly match airframe characteristics with available engines at approximately 1000 times the speed of running a detailed finite element model (millions of degrees of freedom), without any reduction in accuracy.

Recently Viewed Items

  • Investigation of Engine-Airframe Vibration Due to Main Rotor Hub Loads Using a Substructuring Framework

    Member Price :
    $15.00
    Your Price :
    $30.00

Popular Products

  • Master Card
  • Visa
  • American Express
  • Customer Support
  • Contact Us
  • Privacy and Security Policies
  • Refund Policies

Copyright © 2022 The Vertical Flight Society. All rights reserved.