Date: Fri, 19 Aug 2022 15:22:20 -0500 (CDT) Message-ID: <1796216586.33506.1660940540384@cornell1-cos-conf1.managed.contegix.com> Subject: Exported From Confluence MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_Part_33505_1826070528.1660940540384" ------=_Part_33505_1826070528.1660940540384 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Content-Location: file:///C:/exported.html Modal Analysis of a Wing - Numerical Results

# Modal Analysis of a Wing - Numerical Results

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Author: Benjamin Mullen, Cornell University

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# Numerical = Results

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### Modal Freq= uencies

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Mode Number

Frequency

1

4.8329

2

25.327

3

32.175

4

38.089

5

48.315

6

53.540

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### Mode 1

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### Mode 2

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### Mode 3

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### Mode 4

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### Mode 5

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### Mode 6

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Breathing Mode

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In mode 6, the upper surface of the wing displaces downward and the lowe= r surface of the wing displaces upward. Since the amplitude is arbitrary, t= he two surfaces may even cross each other. Obviously, this is impossible, b= ut there is nothing in our model that says this cannot happen. It is import= ant to realize our model only applies to small vibrations and the displacem= ent amplitude does not represent a real world value. This mode, when the up= per surface and lower surface displace in this fashion is called a "breathi= ng mode"

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Go to Step= 7: Verification & Validation

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Go to all ANSYS L= earning Modules