Delft University of Technology
Faculty Mechanical, Maritime and Materials Engineering
Transport Technology

R. Spaargaren Veren en dempers, toegepast in de transporttechniek.
Literature survey, Report 2000.TT.5334, Transport Engineering and Logistics.

In this thesis springs and dampers are discussed. In the introductory chapter concepts like spring stiffness, spring work, damping coefficient and application-degree are discussed. These are universal concepts that are applicable to every spring and damper. In the chapter "Springs" a short description is given of the different kinds of springs. Then the metal springs are discussed more fundamentally. The following springs are discussed in this chapter: barsprings, ringsprings, leafsprings, spiralsprings, roll- and turnsprings, disksprings, turnbarsprings, compressionsprings, tenstionsprings and exceptional shaped springs.
In the chapter "Dampers", the dampers are divided into three groups: the passive damper, the semi-active damper and the active damper. In the thesis only a number of passive dampers and semi-active dampers are discussed. A number of ways of passive damping is discussed: Visco elastic materials, viscose fluids, shockdamper and piezo-electrical elements. The semi-active dampers are discussed by discussing the principal of a variable oildamper and a magneto-rheological and electro-rheological damper.
In the last chapter an example is given of the application of a damper in the practice. An example is given of the choice of a cranebuffer. By a calculation a specific kind of hydraulic buffer is chosen. Then a number of control calculations are made.
In the appendix a calculation is given of the force acting in the ringspring during the load or relief of an external force. Also a dynamic model is formulated and calculated of a barspring.

Reports on Transport Engineering and Logistics (in Dutch)
Modified: 2006.12.31; , TU Delft / 3mE / TT / LT.