Sökning: "Experimental modal analysis EMA"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Experimental modal analysis EMA.

  1. 1. Numerical and Experimental Modal Analysis of CNC Machine

    Master-uppsats, Blekinge Tekniska Högskola

    Författare :Pacifique Uwajambo; Nisha Thakur; [2021]
    Nyckelord :;

    Sammanfattning : Numerical and Experimental Modal Analysis of RAW CNC milling machine was performed in this project. The RAW CNC machine's lightweight, easy assembling, and operation features make it a good choice for hobbyists and professionals. LÄS MER

  3. 2. EXPERIMENTAL CHARACTERIZATION AND COMPUTATIONAL DYNAMIC MODELLING OF A VIOLIN Analysing the effects of creep and string tension

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Byggnadsmekanik; Lunds universitet/Institutionen för byggvetenskaper

    Författare :Joel Värelä; Erik Tunlid; [2020]
    Nyckelord :Violin; experimental modal analysis; modal analysis; EMA; finite element method; FEM; FE; wood; Technology and Engineering;

    Sammanfattning : During the 17th and early 18th century Antonio Stradivari built around 900 violins, that still today are considered some of the best instruments ever created. The theories of how it was possible for a luthier active 300 years ago to create instruments of this quality are many, including unique wood properties and secret building techniques. LÄS MER

  4. 3. Evaluate Operational Modal Analysis and Compare the Result to Visualized Mode Shapes

    Master-uppsats, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Baiyi Song; [2017]
    Nyckelord :Operational Modal Analysis; FDD; SSI; Experimental Modal Analysis; Noise and Vibration Test;

    Sammanfattning : The prototypes vibration test carried out for obtaining reliable information concerning machine’s dynamic properties in development process. Analysis results should be able to correlate with FE model to determine if some underlying assumptions (material properties & boundary conditions) were correct. LÄS MER

  5. 4. Methodology and vibrational analysis for measurements on a VTOL RAPS

    Master-uppsats, Linköpings universitet/Fluida och mekatroniska system

    Författare :Dino Krantz; [2017]
    Nyckelord :Experimental modal analysis; impact hammer test; methodology; structural vibration; RPAS; VTOL; Certification;

    Sammanfattning : In this thesis a methodology for measuring vibrations has been produced andinvestigated for APID 60, a rotorcraft in a Vertical Take-off and landing remotelypiloted aircraft system (VTOL RPAS). A comparative study was carried out forthe purpose of identifying the methodology with respect to design modificationscommon to the APID 60. LÄS MER

  7. 5. 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