| 1. Identity statement | |
| Reference Type | Report |
| Site | marte3.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YCT/GUnJo |
| Repository | sid.inpe.br/iris@1905/2005/07.29.05.31 (restricted access) |
| Last Update | 2015:07.07.17.31.25 (UTC) marciana |
| Metadata Repository | sid.inpe.br/iris@1905/2005/07.29.05.31.41 |
| Metadata Last Update | 2018:06.06.04.03.14 (UTC) administrator |
| Report Number | INPE-6402-PRP/207 |
| Label | 7770 |
| Citation Key | Meijerink:1995:OpMaSt |
| Title | Optimization Masco structure  |
| Year | 1995 |
| Secondary Date | 19971215 |
| Access Date | 2024, May 05 |
| Type | PRP |
| Number of Pages | 87 |
| Number of Files | 1 |
| Size | 1877 KiB |
| 2. Context | |
| Author | Meijerink, G. G. T. |
| Group | INPE-MCT-BR |
| Institution | INPE |
| City | Sao Jose dos Campos |
| History (UTC) | 2014-09-29 15:13:37 :: administrator -> marciana :: 1995 2015-07-07 17:31:26 :: marciana -> administrator :: 1995 2018-06-06 04:03:14 :: administrator -> marciana :: 1995 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Keywords | ENGENHARIA E TECNOLOGIA ESPACIAL |
| Abstract | The MASCO project consists of an astronomical experiment designed to investigate X and Gamma rays in our galaxy. A telescope will be used to measure these rays. The telescope and the equipments are supported by a truss structure. The truss structure with the telescope and the equipments will be lifted with a stratospheric balloon to an altitude around 40 Km. After the experiments have been executed the MASCO structure will be released from the balloon. A parachute is foreseen to minimize the velocity at impact. The structure and telescope shall survive the landing loads. It is important to minimize the mass of the structure because a lower mass means a lighter and smaller balloon and lighter and less expensive ground equipment (e.g. trucks needed to hold the balloon during inflation). By using the optimizer available in MSC/NASTRAN a mass reduction of the MASCO-structure of around 30 is obtained. The total mass of the proposed structure after optimization is 179 Kg (previous estimate 300 Kg). In the optimization program 15 design variables are selected. Seven representing widths of squared cross section BARS, seven representing wall thicknesses and one representing a platform thickness. The BAR dimensions finally selected have been defined according to a Brazilian supplier standard sizes. Using a optimization tool available in MSC/NASTRAN has several advantages with respect to a 'standard finite element analysis': 1) The optimizer prints retained analysis responses that are within a certain specified percentage of the allowable value. The corresponding critical elements are also printed. This automates the search for critical locations thus making investigation of the analysis results much easier. 2) The optimizer allows the user to define equations that can for instance represent a certain analysis response that normally would not be calculated (e.g. Euler- or local buckling equations). 3) The optimizer allows control of responses like allowable displacements that otherwise could only be realized with a time consuming iterative process. |
| Area | ETES |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Target File | INPE-6402-PRP-207.pdf |
| User Group | administrator marciana |
| Visibility | shown |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Host Collection | sid.inpe.br/banon/2001/04.03.15.36 |
| 6. Notes | |
| Empty Fields | affiliation archivingpolicy archivist callnumber contenttype copyholder copyright creatorhistory date descriptionlevel dissemination doi e-mailaddress edition electronicmailaddress format isbn issn language lineage mark mirrorrepository nextedition nexthigherunit notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup recipient resumeid rightsholder schedulinginformation secondarykey secondarymark secondarytype session shorttitle sponsor subject tertiarymark tertiarytype translator url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
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