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Title: Interface reduction for Hurty/Craig-Bampton substructured models: Review and improvements

Journal Article · · Mechanical Systems and Signal Processing
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [7]
  1. Univ. of Colorado, Boulder, CO (United States). Dept. of Aerospace Engineering Sciences
  2. Delft Univ. of Technology (Netherlands). Dept. of Maritime and Materials Engineering
  3. Univ. of Stuttgart, Stuttgart (Germany)
  4. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  5. Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
  6. Federal Inst. of Technology, Zurich (Switzerland). Inst. for Mechanical Systems
  7. Rice Univ., Houston, TX (United States). Dept. of Mechanical Engineering
+ Show Author Affiliations

The Hurty/Craig-Bampton method in structural dynamics represents the interior dynamics of each subcomponent in a substructured system with a truncated set of normal modes and retains all of the physical degrees of freedom at the substructure interfaces. This makes the assembly of substructures into a reduced-order system model relatively simple, but means that the reduced-order assembly will have as many interface degrees of freedom as the full model. When the full-model mesh is highly refined, and/or when the system is divided into many subcomponents, this can lead to an unacceptably large system of equations of motion. To overcome this, interface reduction methods aim to reduce the size of the Hurty/Craig-Bampton model by reducing the number of interface degrees of freedom. This research presents a survey of interface reduction methods for Hurty/Craig-Bampton models, and proposes improvements and generalizations to some of the methods. Some of these interface reductions operate on the assembled system-level matrices while others perform reduction locally by considering the uncoupled substructures. The advantages and disadvantages of these methods are highlighted and assessed through comparisons of results obtained from a variety of representative linear FE models.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000; NA-0003525
OSTI ID:
1478217
Alternate ID(s):
OSTI ID: 1582728
Report Number(s):
SAND-2017-3191J; PII: S088832701830284X
Journal Information:
Mechanical Systems and Signal Processing, Vol. 114, Issue C; ISSN 0888-3270
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (2)

Multifidelity component interface reduction and modal truncation augmentation
  • Gibanica, Mladen; Abrahamsson, Thomas J. S.; Rixen, Daniel J.
  • International Journal for Numerical Methods in Engineering, Vol. 120, Issue 1 https://doi.org/10.1002/nme.6126
journal June 2019
Statistical Analysis of the Nonlinear Response of Bladed Disks with Mistuning and Cracks journal November 2019

Figures / Tables (23)

Figure 1(p. 3)figure Figure 1
Figure 2(p. 4)figure Figure 2
Table 1(p. 14)table Table 1
Table 2(p. 14)table Table 2
Table 3(p. 14)table Table 3
Figure 3(p. 15)figure Figure 3
Table 4(p. 16)table Table 4
Table 5(p. 16)table Table 5
Figure 4(p. 17)figure Figure 4
Table 6(p. 17)table Table 6
Figure 5(p. 18)figure Figure 5
Figure 6(p. 19)figure Figure 6
Figure 7(p. 20)figure Figure 7
Figure 8(p. 20)figure Figure 8
Table 7(p. 20)table Table 7
Figure 9(p. 21)figure Figure 9
Table 8(p. 22)table Table 8
Table 9(p. 22)table Table 9
Figure 10(p. 23)figure Figure 10
Figure 11(p. 24)figure Figure 11
Figure A.1(p. 26)figure Figure A.1
Figure A.2(p. 27)figure Figure A.2
Figure A.3(p. 27)figure Figure A.3

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Related Subjects

42 ENGINEERING
Component mode synthesis
Substructuring
Hurty/Craig-Bampton method
Interface reduction
Characteristic constraint modes