Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

QUESTION NO 1: The wing is a very flexible part of the airplane. If the frequency of periodic vibration of the gust has a

image

QUESTION NO 1: The wing is a very flexible part of the airplane. If the frequency of periodic vibration of the gust has a frequency similar to the natural structural frequency of the wing, it will enter resonance aeroelastic flutter and the up and down deflection of the wing will be increased, amplified, and eventually lead to its destruction. Emergence of flutter compromises not only the long term durability of the wing structure, but also the operational safety, flight performance and energy efficiency of the aircraft. Therefore, it is critical to identify the natural frequencies and mode shapes of the wing structure in order to avoid resonance at these frequencies. A passenger airplane wing, can modeled as a three-degree-of-freedom lumped-mass system, as shown in the figure below: I. Please estimate the fundamental frequency of vibration of the system as a function of mass and stiffness, assuming the mode shape and the following system parameters: k= k, k= 2k, k3 = 3k, m1 = m, m = 2m, m3 = 3m II. Please identify which method you are using to estimate the fundamental frequency and why? III. The estimated fundamental frequency is higher or lower than the exact value of fundamental frequency? TOF -1- -13- X1 X2 X3 Figure 1: A) Antonov Aircraft. B) Three degree of Freedom lumped mass system model of Antonov Aircraft Wing

Step by Step Solution

There are 3 Steps involved in it

Step: 1

blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Managerial Decision Modeling With Spreadsheets

Authors: Nagraj Balakrishnan, Barry Render, Jr. Ralph M. Stair

3rd Edition

136115837, 978-0136115830

More Books

Students also viewed these Mechanical Engineering questions