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Showing result 1 - 5 of 42 essays matching the above criteria.

1. 1. Mapping of IPM machine efficiency and Noise Vibration Harshness : An investigation into trade-offs with respect to efficiency and Noise Vibration Harshness

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Bix Eriksson; Erik Rudqvist; [2023]
   Keywords : ;

   Abstract : Due to the recent shift towards electrification, electric machines has become a prominent option to be used in vehicle applications. Much effort is spent in the development process of these machines to make optimizations in order to improve the performance aspects of the machine. READ MORE

3. 2. Characterization of Kelvin Cell Cored Sandwich Structures with Analysis and Experiments

   University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

   Author : Sabahattin Bora Günay; [2023]
   Keywords : Kelvin Cell; Sandwich Structure; Space Structures; Three Point Bending Test; Structural Stiffness; Kelvin-cell; smörgåsstruktur; rymdstrukturer; trepunktsböjningstest; strukturell styvhet;

   Abstract : In order to satisfy the mechanical requirements for space structures, achieving lightweight designs is of the greatest significance. The primary focus of this study is the utilization of Kelvin cell core in the design of sandwich structures for space applications. READ MORE

4. 3. Time-resolved x-ray diffraction study of longitudinal optical phonons in zincblende semiconductors

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Lassi Linnala; [2022]
   Keywords : femtosecond THz radiation; ultrafast x-ray diffraction; pump-probe; longitudinal optical phonons; zincblende semiconductors; anharmonic decay; density functional perturbation theory; Physics and Astronomy;

   Abstract : Anharmonic decay of longitudinal optical (LO) phonons in zincblende semiconductors is not at present well characterized due to the polar and many-body nature of the problem. Femtosecond THz radiation offers a novel route to this study, as the interaction of this radiation is directly with the phonon lattice and these THz excited phonons do not have enough energy to excite electrons over the band gap. READ MORE

5. 4. Experimental acceleration Measurements and Finite Elements Modeling

   University essay from Linnéuniversitetet/Institutionen för maskinteknik (MT)

   Author : Ibrahim Alnimairi; Salim Arrabi; [2021]
   Keywords : signal processing. PSD; mode shapes; Mdof; Sdof; PSDT-SVD; finite element modelling;

   Abstract : Heavy crushing machines under their production shifts, creates various levels of vibration, noise and dynamic forces which can be transferred to other parts of the industrial unit. Such kind of factors applies continuous forces on machine parts which can cause gradual fatigue, creep and eventually failure of machine. READ MORE

6. 5. Test Equipment for Physical Testing of Vibration Isolator

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : ADAM ALVETEG; MARKUS JOHANSSON; [2021]
   Keywords : Test rig; vibration isolator; hysteresis; Testrigg; vibrationsisolator; hysteres;

   Abstract : Vibrations is a phenomenon that can cause problems to systems if not dealt with. In heavy duty trucks, vibrations are mainly caused by uneven roads and from the combustion engine. Vibrations can damage components, reduce their service life and cause discomfort for the driver. READ MORE