Study on the Effect of Prestress to the Dynamic Characteristics of Truss String Structure
Truss string structure (TSS) is a new type of large-span space structure which is composed of upper spatial truss and bottom high-strength cables with vertical supports. For certain upper truss, the main affect factor of dynamic characteristics of a TSS are prestress of the cables, pole number, rise-span ratio and vertical span ratio. In modal parameters, modal frequencies is the most direct and easily observed parameter, which largely reflects the stiffness of the structure and plays an important role in the dynamic response of the structure. In this paper, the mode testing experiment and finite element analysis is executed, to study the changes of the lower modal frequencies in different prestressed cables and to study the influence of the prestress to the dynamic properties of TSS.
Y. Z. Luo and R. F. Tong, "Study on the Effect of Prestress to the Dynamic Characteristics of Truss String Structure", Advanced Materials Research, Vols. 163-167, pp. 2571-2575, 2011