Essays about: "oma"

Showing result 6 - 10 of 14 essays containing the word oma.

1. 6. Experimental Procedures for Operational Modal Analysis of a Power Pack on a Drill Rig

   University essay from Linköpings universitet/Mekanik och hållfasthetslära

   Author : Oscar Nilsson; [2017]
   Keywords : Operational modal analysis; OMA; engine sweep; modal identication; harmonic scaling;

   Abstract : All structures have modal properties such as natural frequencies and damping. In engineeringit is often of interest to estimate these modal properties for certain structures, to be used whenmodelling for example fatigue. This is done by computing them from finite element models, by using experimental measurements or both. READ MORE

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

   University essay from Blekinge Tekniska Högskola/Institutionen för maskinteknik

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

   Abstract : 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. READ MORE

4. 8. Investigation on Model Based Observers for SpaceStructure Load Characterization

   University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

   Author : Adrian Exposito Garcia; [2016]
   Keywords : Kalman; Unscented; Structures; Model; Characterization; Space;

   Abstract : The experimental determination of dynamic characteristics of elastic structures, in particularof space flight related structures typically is performed by experimental modal analysis(EMA) or output-only modal analysis (OMA). This document is focused on the OMA methodsand state-space modelling, the motivation for this approach is the possibility to monitorthe real loading of a structure in order to provide a loading history which may be used foran assessment of safe remaining life once the dynamic characteristics has been determined. READ MORE

5. 9. Frequency Analysis of Rottne Comfort Line

   University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

   Author : Jan Grzeszczak; Michał Płygawko; [2014]
   Keywords : Centre of gravity; Hammer test; Inertia Properties; LMS; Mass line; OMA; Vibration testing;

   Abstract : The European Parliment stipulated regulations concerning the forestry vehicles operators' health and working conditions. The allowed whole body vibrations were limited, which influenced the design of the vehicles' cabin. Surveys show a strong correlation between operator's comport and their productivity. READ MORE

6. 10. Modal Testing and Structural Identification

   University essay from Lunds universitet/Institutionen för byggvetenskaper; Lunds universitet/Byggnadsmekanik

   Author : Tobias Kristensson; [2014]
   Keywords : Modal testing; Modal analysis; Structural identification; Vibration; Signal; EMA; OMA; Technology and Engineering;

   Abstract : Bridges have been built around the world for at least 3000 years and have made it possible for man to travel over obstacles like valleys and rivers, which has contributed to the rapidly growing infrastructure we have today. Efforts made to save materials and reduce production costs have led to lighter and slender structures, which in turn can cause dynamic problems where the bridge is sensitive to vibrations. READ MORE