CEN/TR 17603-32-25:2022
(Main)Space engineering - Mechanical shock design and verification handbook
Space engineering - Mechanical shock design and verification handbook
The intended users of the “Mechanical shock design and verification handbook” are engineers involved in design, analysis and verification in relation to shock environment in spacecraft. The current know-how relevant to mechanical shock design and verification is documented in this handbook in order to make this expertise available to all European spacecraft and payload developers.
The handbook provides adequate guidelines for shock design and verification; therefore it includes advisory information, recommendations and good practices, rather than requirements.
The handbook covers the shock in its globally, from the derivation of shock input to equipment and sub-systems inside a satellite structure, until its verification to ensure a successful qualification, and including its consequences on equipment and sub-systems. However the following aspects are not treated herein:
- No internal launcher shock is treated in the frame of this handbook even if some aspects are common to those presented hereafter. They are just considered as a shock source (after propagation in the launcher structure) at launcher/spacecraft interface.
- Shocks due to fall of structure or equipment are not taken into account as they are not in the frame of normal development of a spacecraft.
Raumfahrttechnik - Handbuch zu mechanischem Design und Verifikation für Stöße
Ingénierie spatiale - Chocs mécaniques: Manuel de conception et de vérification
Vesoljska tehnika - Priročnik za načrtovanje in preverjanje mehanskih udarcev
Predvideni uporabniki »Priročnika za načrtovanje in preverjanje mehanskih udarcev« so inženirji, ki se ukvarjajo s projektiranjem, analiziranjem ali preverjanjem v zvezi z udarci v okolju uporabe vesoljskih plovil. Ta priročnik dokumentira dosedanje strokovno znanje v zvezi z načrtovanjem in preverjanjem mehanskih udarcev, da se dostop do njega omogoči vsem evropskim razvijalcem vesoljskih plovil in nosilnih raket.
Priročnik zagotavlja ustrezne smernice za načrtovanje in preverjanje mehanskih udarcev; kot tak vsebuje informacije svetovalne narave, priporočila ter dobre prakse in ne podaja zahtev.
Priročnik obravnava celoten potek udarca, od vira udarca v opremo in podsisteme znotraj satelitske strukture do njegovega preverjanja, da se zagotovi uspešna kvalifikacija, vključuje pa tudi posledice udarca na opremo in podsisteme. Ne obravnava pa naslednjih vidikov:
– v okviru tega priročnika niso obravnavani udarci v notranjosti lansirnika, čeprav so nekateri vidiki skupni tistim, ki so predstavljeni v nadaljevanju. Obravnavani so le kot vir udarcev (po širjenju skozi konstrukcijo lansirnika) na vmesniku med lansirnikom in vesoljskim plovilom;
– udarci zaradi padca konstrukcije ali opreme niso upoštevani, saj ne sodijo v okvir običajnega razvoja vesoljskega plovila.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2022
Vesoljska tehnika - Priročnik za načrtovanje in preverjanje mehanskih udarcev
Space engineering - Mechanical shock design and verification handbook
Raumfahrttechnik - Handbuch zu mechanischem Design und Verifikation für Stöße
Ingénierie spatiale - Chocs mécaniques: Manuel de conception et de vérification
Ta slovenski standard je istoveten z: CEN/TR 17603-32-25:2022
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
TECHNICAL REPORT CEN/TR 17603-32-25
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
June 2022
ICS 49.035; 49.140
English version
Space engineering - Mechanical shock design and
verification handbook
Ingénierie spatiale - Chocs mécaniques: Manuel de Raumfahrttechnik - Handbuch zu mechanischem
conception et de vérification Design und Verifikation für Stöße
This Technical Report was approved by CEN on 13 April 2022. It has been drawn up by the Technical Committee CEN/CLC/JTC 5.
CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2022 CEN/CENELEC All rights of exploitation in any form and by any means Ref. No. CEN/TR 17603-32-25:2022 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Table of contents
European Foreword . 9
Introduction . 10
1 Scope . 11
2 References. 12
2.1 References of Part 1 . 12
2.2 References of Part 2 . 12
2.3 References of Part 3 . 14
2.4 References of Part 4 . 16
3 Terms, definitions and abbreviated terms . 19
3.1 Terms and definitions from other documents . 19
3.2 Terms and definitions specific to the present document . 19
3.3 Abbreviated terms. 20
4 Background – Shock environment description . 24
4.1 Shock definition and main characteristics . 24
4.1.1 Shock definition . 24
4.1.2 Physical aspects of shocks . 25
4.1.3 Main shock effects . 25
4.1.4 Shock response spectra (SRS) . 26
5 Shock events . 31
5.1 Shock occurrence . 31
5.2 Shock environmental categories . 31
6 Introduction to shock design and verification process . 34
6.1 Presentation of the global process . 34
6.2 Means to conduct an evaluation of shock environment and criticality. 36
7 Shocks in spacecraft . 38
7.1 Overview . 38
7.2 Potential shock sources for spacecraft . 38
7.3 Shocks devices description . 39
7.4 Detailed information on specific shock events . 42
7.4.1 Overview . 42
7.4.2 Launcher induced shocks. 42
7.4.3 Clampband release . 49
7.4.4 Other S/C separation systems. 56
7.4.5 Internal shock sources . 64
7.4.6 Landing and splashdown. 69
7.5 Conclusion . 72
8 Shock inputs derivation by similarity-heritage-extrapolation . 73
8.1 Overview . 73
8.2 Similarity-heritage-extrapolation methods principle . 74
8.2.1 Overview . 74
8.2.2 Use of database . 74
8.2.3 Zoning procedure . 78
8.2.4 SRS ratio as approximation of transfer functions . 79
8.2.5 Difference between structural model and flight model . 82
8.2.6 Statistical methods to derive maximum expected environment. 83
8.3 Similarity-heritage-extrapolation methods in practice . 92
8.3.1 Method A – Point source excitation . 93
8.3.2 Method B – Clampband excitation . 99
8.3.3 Method C – Launcher induced shock . 105
8.3.4 Method D – Unified approach and practical implementation of
attenuation rules for typical spacecraft shock generated environments . 114
8.3.5 Additional attenuation factors . 121
8.3.6 Method E – Shock responses in instruments. 122
9 Shock inputs derivation by numerical analysis . 126
9.1 Numerical simulation principles . 126
9.1.1 Rationale and limitations . 126
9.2 Finite Element Analysis (FEA) Numerical methods . 127
9.2.1 Comparison of explicit and implicit methods . 127
9.2.2 Explicit and implicit integration schemes . 129
9.2.3 Example of simulation codes (implicit and explicit) . 129
9.2.4 Modelling aspects . 131
9.3 Statistical Energy Analysis (SEA) Numerical Methods . 152
9.3.1 The classical SEA approach . 152
9.3.2 The Transient SEA formulation . 153
9.3.3 Prediction of shock response by Local Modal Phase Reconstruction
(LMPR) . 153
9.3.4 Virtual SEA modelling for robust SEA modelling in the mid-frequency. 155
9.4 Best practices for shock derivation by simulation . 157
9.5 Examples of methodology for numerical simulation . 158
9.5.1 Numerical simulation for clampband release . 158
9.5.2 Numerical simulation for Shogun . 161
9.5.3 Numerical simulation for launcher induced shock . 165
9.5.4 Implicit vs. explicit method: Example of a shock prediction on a
complex structure . 174
9.5.5 Shock prediction analysis examples using SEA-Shock module of
SEA+ software . 176
10 Deriving a specification from a shock environment . 180
10.1 Specification tool . 180
10.2 Deriving the qualification environment – MEE and qualification margin . 183
10.3 From level derivation/Measure to specification . 183
11 Shock attenuation . 185
11.1 Definitions . 185
11.1.1 History of shock attenuation . 185
11.1.2 Impedance breakdown . 186
11.1.3 Shock and vibration Isolator . 187
11.1.4 Damper . 189
11.1.5 Shock absorber . 190
11.2 Theoretical background . 191
11.2.1 Shock attenuation problematic approach . 191
11.2.2 Shock isolator device features . 193
11.2.3 Rubber and damping effect . 193
11.2.4 Elastomer type selection . 199
11.3 Attenuator device development. 202
11.3.1 Overview . 202
11.3.2 Attenuator requirement definition . 202
11.3.3 Attenuator device development logic . 205
11.4 Attenuator device manufacturing . 210
11.4.1 Overview . 210
11.4.2 Manufacturing process . 210
11.4.3 Moulding technology . 211
11.4.4 Manufacturing limitations. 213
11.5 Product assurance logic. 213
11.6 Existing attenuator products . 214
11.6.1 Overview . 214
11.6.2 Compact shock attenuators for electronic equipment . 214
11.6.3 SASSA (shock attenuator system for spacecraft and adaptor) . 216
11.6.4 Shock isolators for EXPERT on-board equipment . 221
12 General approach to shock verification . 226
12.1 Rationale for shock verification . 226
12.2 Test rationale and model philosophy . 229
12.2.1 Qualification test . 229
12.2.2 Acceptance test . 231
12.2.3 System / subsystem distinction . 231
12.2.4 Model philosophy .
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.