Sökning: "modala tester"

Hittade 2 uppsatser innehållade orden modala tester.

  1. 1. Evaluation of a Contactless Excitation and Response System (CERS) for process planning applications : An experimental study

    Master-uppsats, KTH/Industriell produktion

    Författare :Laura Montalban; [2016]
    Nyckelord :mechanical vibrations; natural frequencies; damping ratio; chatter; structural dynamic tests; stability lobe diagrams.; mekaniska vibrationer; egenfrekvens; dämpning; chatter; strukturdynamiska tester; stabilitetsdiagram.;

    Sammanfattning : Chatter vibration is a common problem for the manufacturing industry that limits the productivity, accuracy and surface quality of machined parts. This study is focused on the out of process methods, such as Stability Lobe Diagrams (SLD), that ensure the selection of the optimal cutting parameters in which the machining process is stable. LÄS MER

  3. 2. Pilot Testing of a Hydraulic Bridge Exciter

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Richard Borg; Olivier Dymén; [2015]
    Nyckelord :Hydraulic bridge exciter; controlled excitation; modal testing; experimental modal analysis; railway bridges; measurements; load shaker; FEM; FE-modelling; script; Hydraulisk broexciterare; kontrollerad excitering; modala tester; experimentell modal analys; järnvägsbroar; mätningar; lastexciterare; FEM; FE-modellering; script;

    Sammanfattning : In the design of a railway bridge that is meant for train speeds larger than 200 km/h, the Swedish Traffic Administration requires a dynamic analysis in addition to the conventional static design. The models used for static design may not always be suitable for dynamic analysis, which could lead to inaccurate estimations of the dynamic response. LÄS MER