Calculating Implicit Reserve Factor Sensitivities from Performance Envelopes

Sriharsha Sheshanarayana; Atipong Dharmasaroja; Cecil Armstrong; Trevor Robinson; Adrian Murphy; James Barron

doi:10.2514/6.2018-1655

Calculating Implicit Reserve Factor Sensitivities from Performance Envelopes

Sriharsha Sheshanarayana, Atipong Dharmasaroja, Cecil Armstrong, Trevor Robinson, Adrian Murphy, James Barron

School of Mechanical and Aerospace Engineering

Research output: Contribution to conference › Paper

Abstract

The largest computational cost associated with any gradient based optimization is the calculation of gradients themselves. The link between global and local optimization process for an overall aircraft structural design is the reserve factor (RF) sensitivity chain. This paper discusses a novel approach to compute the implicit part of the chain economically. This approach exploits of the concepts of characteristic loads and performance envelopes, which are briefly introduced. To demonstrate the approach the sensitivities of RF to changes in design variables are presented for a simple compound bar assembly and a structural element representing a wing top cover panel.

Original language	English
DOIs	https://doi.org/10.2514/6.2018-1655
Publication status	Published - 11 Jan 2018
Event	AIAA Science and Technology Forum and Exposition - Gaylord Palms, Kissimmee, United States Duration: 08 Jan 2018 → 12 Jan 2018 https://scitech.aiaa.org/

Conference

Conference	AIAA Science and Technology Forum and Exposition
Abbreviated title	SciTech
Country/Territory	United States
City	Kissimmee
Period	08/01/2018 → 12/01/2018
Internet address	https://scitech.aiaa.org/

Access to Document

10.2514/6.2018-1655

Performance envelopes for preliminary sizing of aircraft structures
Sheshanarayana, S. (Author), Robinson, T. (Supervisor), Armstrong, C. (Supervisor) & Murphy, A. (Supervisor), Dec 2020
Student thesis: Doctoral Thesis › Doctor of Philosophy

File

Cite this

@conference{b20847df4ba74a93887b29469dfc57f1,

title = "Calculating Implicit Reserve Factor Sensitivities from Performance Envelopes",

abstract = "The largest computational cost associated with any gradient based optimization is the calculation of gradients themselves. The link between global and local optimization process for an overall aircraft structural design is the reserve factor (RF) sensitivity chain. This paper discusses a novel approach to compute the implicit part of the chain economically. This approach exploits of the concepts of characteristic loads and performance envelopes, which are briefly introduced. To demonstrate the approach the sensitivities of RF to changes in design variables are presented for a simple compound bar assembly and a structural element representing a wing top cover panel.",

author = "Sriharsha Sheshanarayana and Atipong Dharmasaroja and Cecil Armstrong and Trevor Robinson and Adrian Murphy and James Barron",

year = "2018",

month = jan,

day = "11",

doi = "10.2514/6.2018-1655",

language = "English",

note = "AIAA Science and Technology Forum and Exposition, SciTech ; Conference date: 08-01-2018 Through 12-01-2018",

url = "https://scitech.aiaa.org/",

}

TY - CONF

T1 - Calculating Implicit Reserve Factor Sensitivities from Performance Envelopes

AU - Sheshanarayana, Sriharsha

AU - Dharmasaroja, Atipong

AU - Armstrong, Cecil

AU - Robinson, Trevor

AU - Murphy, Adrian

AU - Barron, James

PY - 2018/1/11

Y1 - 2018/1/11

N2 - The largest computational cost associated with any gradient based optimization is the calculation of gradients themselves. The link between global and local optimization process for an overall aircraft structural design is the reserve factor (RF) sensitivity chain. This paper discusses a novel approach to compute the implicit part of the chain economically. This approach exploits of the concepts of characteristic loads and performance envelopes, which are briefly introduced. To demonstrate the approach the sensitivities of RF to changes in design variables are presented for a simple compound bar assembly and a structural element representing a wing top cover panel.

AB - The largest computational cost associated with any gradient based optimization is the calculation of gradients themselves. The link between global and local optimization process for an overall aircraft structural design is the reserve factor (RF) sensitivity chain. This paper discusses a novel approach to compute the implicit part of the chain economically. This approach exploits of the concepts of characteristic loads and performance envelopes, which are briefly introduced. To demonstrate the approach the sensitivities of RF to changes in design variables are presented for a simple compound bar assembly and a structural element representing a wing top cover panel.

U2 - 10.2514/6.2018-1655

DO - 10.2514/6.2018-1655

M3 - Paper

T2 - AIAA Science and Technology Forum and Exposition

Y2 - 8 January 2018 through 12 January 2018

ER -

Calculating Implicit Reserve Factor Sensitivities from Performance Envelopes

Abstract

Conference

Access to Document

Fingerprint

Student theses

Performance envelopes for preliminary sizing of aircraft structures

Cite this