Suprayitno Suprayitno
Truss structures are exceedingly common in engineering applications, including bridges, towers, in buildings, and numerous mechanical applications. An optimum design of truss structure significantly improves the structural performance and material savings. Traditionally, a truss structure is optimized under a certain condition such as material properties, load and geometry, which is deterministic. The deterministic optimization may result in an inferior solution when small changes in actual operation are different from design parameters. In real situations, a truss structure may operate at various uncertain operating conditions, such as different material properties, loading conditions, and dimensional errors resulting during manufacturing processes. Optimization under uncertainty recognizes that the design performance fluctuates in probabilistic distribution rather than deterministic values. Optimization considering uncertain quantities results in a robust design that is less sensitive to small changes in design parameters. This paper presents a robust optimum design of truss structure under some uncertain operating conditions, especially under dimensional errors resulting during manufacturing process. A robustness index is deployed as quality measure of the truss design. © 2024 Author(s).
Mechanical and Industrial Engineering Department, Faculty of Engineering, State University of Malang, Malang, Indonesia