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Structural and Multidisciplinary Optimization

Erschienen in:

01.12.2014 | RESEARCH PAPER

Linear programming approach to design of spatial link mechanism with partially rigid joints

verfasst von: Makoto Ohsaki, Yoshihiro Kanno, Seita Tsuda

Erschienen in: Structural and Multidisciplinary Optimization | Ausgabe 6/2014

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Abstract

A simple systematic approach is presented for designing a spatial link mechanism with partially rigid joints. A linear programming (LP) problem to find an infinitesimal mechanism that maximizes the output displacement is first formulated. The objective function of this LP problem has a penalty term to obtain a sparse solution including small numbers of hinges and members to be removed. It is shown that the dual of this LP problem can be regarded as a plastic limit analysis problem that maximizes the load factor under the equilibrium condition and upper- and lower-bound constraints on the member-end forces of a given frame structure. A heuristic approach is presented to obtain a finite mechanism by solving the LP problem after updating the nodal locations in the direction of inextensional deformation. It is shown in the numerical examples that various planar and spatial mechanisms can be easily found using the proposed method.

Vorheriger Artikel Topology optimization with flexible void area

Nächster Artikel Finite element analysis of no–tension structures as a topology optimization problem

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Titel: Linear programming approach to design of spatial link mechanism with partially rigid joints
verfasst von: Makoto Ohsaki
Yoshihiro Kanno
Seita Tsuda
Publikationsdatum: 01.12.2014
Verlag: Springer Berlin Heidelberg
Erschienen in: Structural and Multidisciplinary Optimization / Ausgabe 6/2014
Print ISSN: 1615-147X
Elektronische ISSN: 1615-1488
DOI: https://doi.org/10.1007/s00158-014-1094-y

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