Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"MODAL METHODS"”.
-
Development of advanced modal methods for calculating transient thermal and structural response
This dissertation evaluates higher-order modal methods for predicting thermal and structural response. More accurate methods or ones which can significantly reduce the size of complex, transient thermal and structural problems are desirable for analysis and are required for synthesis of real …
-
Mode-mode interference in optical fibers: analysis and experiment
… constituent modes. Practical implementation of modal methods involves selective launching of modes and processing of the output pattern to demodulate the information. Axial strain has been chosen as the modulating mechanism in experiments designed to quantify mode-mode interference effects. …
-
Métodos de redução de base para problemas térmicos em regime transiente com condições de contorno de radiação e convecção
… there have been a renewed interest in reduction methods for transient heat transfer analysis. Particularly, for transient heat conduction, it has been shown that reduction methods based on Lanczos-type algorithms or Ritz methods are most effective than the usual direct approach (α-methods) or …
-
Using a non-modal method for system identification of highly damped and high modal density mechanical structures
… is traditionally related to the estimation of modal parameters (natural frequencies, modal damping ratios, and mode shapes). Various well known modal methods often fail to extract these parameters for heavily damped structures with high modal densities due to the high coupling between densely …
-
Using a mosaic-based approach to construct children's understanding of safe space in school
… approach, offering child-centred, multi-modal methods enabled seven children and their three teachers to construct their understanding of safe space in school. Children designated as users of safe space due to having autism and/or socioemotional difficulties, led the researcher on a …
-
Joint identification in structural waveguides using wave reflection and transmission coefficients
… due to uncertainty in their properties. Measured modal data can be used to update joint models, but often with limited success. In this thesis a wave approach is employed to investigate the reflection and transmission coefficients of various joint models in structural waveguides. The reflection …
-
ΣΥΜΒΟΛΗ ΣΤΗΝ ΑΝΑΛΥΣΗ ΚΑΙ ΣΤΟΝ ΥΠΟΛΟΓΙΣΜΟ ΑΚΟΥΣΤΙΚΟΕΛΑΣΤΙΚΩΝ ΦΑΙΝΟΜΕΝΩΝ
… THEIR TECHNOLOGICAL IMPORTANCE AND THE METHODS USED FOR THEIR ANALYSIS AND SOLUTION. ALTHOUGHA PROGRESS CAN BE OBSERVED AT THIS POINT, SIGNIFICANT PROBLEMS REMAIN, DUE MAINLY TO THE FACT, THAT AN ADEQUATE PHYSICAL AND SEMANTIC FRAMEWORK IS MISSING FOR THE ANALYSIS OF THE COUPLED SYSTEM. …