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Loop shaping of structural dynamics
dc.creator | Kim, Byeong Hwa | |
dc.date.accessioned | 2012-06-07T22:56:18Z | |
dc.date.available | 2012-06-07T22:56:18Z | |
dc.date.created | 1999 | |
dc.date.issued | 1999 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-1999-THESIS-K562 | |
dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
dc.description | Includes bibliographical references (leaves 104-107). | en |
dc.description | Issued also on microfiche from Lange Micrographics. | en |
dc.description.abstract | Dynamic response of a stature can be characterized by mass, stiffness, and damping. Design of a conventional structure is primarily based on stiffness characteristics because damping is assumed to be negligible. Although stiffness-based design is elective for satisfying requirements related to displacement, this approach leads to overestimated satisfaction of design specifications related to velocity and acceleration. To overcome limitations of a stiffness-based design, a method is presented for design of a structure that meets given dynamic specifications. An optimum level of damping is developed using loop shaping of transfer matrices. Structural characteristics of a laboratory four-story building are identified through an eigensystem realization algorithm for data filtered by wavelets. For given specifications of dynamic performance, optimal stiffness and damping matrices of the specifications of dynamic performance, optimal stiffness and damping matrices of the structure are achieved by solving an algebraic Riccatti equation. Based on the optimal solution, loop shaping of the transfer function matrix is performed to obtain the desired location and capacity of a series of individual dampers. In addition, a linearization scheme to control behavior of a magnetorheological damper is developed using a neural network. Finally, an example of an application of the linear viscous damping device is given by means of a widely used benchmark problem. It is shown that design of dynamic characteristics of a civil engineering structure can be achieved by means of loop shaping technique. In particular, the damping matrix of a structure controls the H[] norm of the transfer matrices. Therefore, application of loop shaping to the transfer matrices, which is a method of damping-based design, guarantees mitigation of the worst-case steady-state response. | en |
dc.format.medium | electronic | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | Texas A&M University | |
dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
dc.subject | civil engineering. | en |
dc.subject | Major civil engineering. | en |
dc.title | Loop shaping of structural dynamics | en |
dc.type | Thesis | en |
thesis.degree.discipline | civil engineering | en |
thesis.degree.name | M.S. | en |
thesis.degree.level | Masters | en |
dc.type.genre | thesis | en |
dc.type.material | text | en |
dc.format.digitalOrigin | reformatted digital | en |
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