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Record Details

Record 53 of 36042
Nonlinear transient analysis of joint dominated structures
Author and Affiliation:
Chapman, J. M.(Boeing Aerospace Co., Seattle, WA, United States)
Shaw, F. H.(Boeing Aerospace Co., Seattle, WA, United States)
Russell, W. C.(Boeing Aerospace Co., Seattle, WA, United States)
Abstract: A residual force technique is presented that can perform the transient analyses of large, flexible, and joint dominated structures. The technique permits substantial size reduction in the number of degrees of freedom describing the nonlinear structural models and can account for such nonlinear joint phenomena as free-play and hysteresis. In general, joints can have arbitrary force-state map representations but these are used in the form of residual force maps. One essential feature of the technique is to replace the arbitrary force-state maps describing the nonlinear joints with residual force maps describing the truss links. The main advantage of this replacement is that the incrementally small relative displacements and velocities across a joint are not monitored directly thereby avoiding numerical difficulties. Instead, very small and 'soft' residual forces are defined giving a numerically attractive form for the equations of motion and thereby permitting numerically stable integration algorithms. The technique was successfully applied to the transient analyses of a large 58 bay, 60 meter truss having nonlinear joints. A method to perform link testing is also presented.
Publication Date: Jan 01, 1987
Document ID:
19870046435
(Acquired Nov 28, 1995)
Accession Number: 87A33709
Subject Category: STRUCTURAL MECHANICS
Report/Patent Number: AIAA PAPER 87-0892
Document Type: Conference Paper
Publication Information: (SEE A87-33654)
Publisher Information: United States
Contract/Grant/Task Num: NAS8-36420
Financial Sponsor: NASA; United States
Organization Source: Boeing Aerospace Co.; Seattle, WA, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FLEXIBLE SPACECRAFT; JOINTS (JUNCTIONS); NONLINEAR SYSTEMS; RESIDUAL STRESS; SPACE ERECTABLE STRUCTURES; TRANSIENT RESPONSE; DEGREES OF FREEDOM; LARGE SPACE STRUCTURES; SHAPE CONTROL; TRUSSES; VIBRATION ISOLATORS
Imprint And Other Notes: IN: Structures, Structural Dynamics and Materials Conference, 28th, Monterey, CA, Apr. 6-8, 1987 and AIAA Dynamics Specialists Conference, Monterey, CA, Apr. 9, 10, 1987, Technical Papers. Part 2A (A87-33654 14-39). New York, American Institute of Aeronautics and Astronautics, 1987, p. 568-577.
Availability Source: Other Sources
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