Essays about: "nvh"

Showing result 6 - 10 of 20 essays containing the word nvh.

  1. 6. 3D Printed Lattice Structure for Driveline Applications

    University essay from KTH/Materialvetenskap

    Author : Boyu Xue; [2021]
    Keywords : Lattice structure; AM Additive Manufacturing ; topology optimization; lattice optimization; NVH noise; vibration and harshness ; mechanical performance; lightweight; driveline; natural frequency; Gitterstruktur; AM additiv tillverkning ; topologioptimering; optimering av gitter; NVH buller; vibrationer och obehag ; mekanisk prestanda; lättvikt; drivlina; egenfrekvens;

    Abstract : Lattice structures have received a lot of attention as cellular materials in recent years because of their outstanding properties, such as high strength-to-weight ratio, heat transfer, energy absorption, and capability of improving noise, vibration and harshness (NVH) behavior. This type of structure received a boost from additive manufacturing (AM) technology, which can fabricate geometries in practically any shape. READ MORE

  3. 7. Simulation and Modelling of Injection Molded Components : Fiber Reinforced Polymers in Powertrain Mounts

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Hanna Jakobsson; [2020]
    Keywords : Material modelling; polymer composites; FRP; orthotropic; powertrain mount; vehicle engineering; Digimat; Material modellering; polymera kompositer; ortotropisk; motorupphängnig; Digimat;

    Abstract : Powertrain mounts' purpose is to mount the engine and the gearbox in the car. Besides that, it isolate the body from the powertrain movements and road excitation. The most common material in powertrain mounts bracket is aluminum but lately, fibre reinforced polymer (FRP) has been acting as a substitute for the aluminum. READ MORE

  4. 8. Fault detection of planetary gearboxes in BLDC-motors using vibration and acoustic noise analysis

    University essay from Uppsala universitet/Institutionen för elektroteknik

    Author : Henrik Ahnesjö; [2020]
    Keywords : Planetary gearbox; Fault detection; Condition Monitoring; Support Vector Machine SVM ; Machine Learning; Supervised Machine Learning; Defect Pinion; Defect Planet Gear; MATLAB; LabVIEW; Soundproof-box; Noise Vibration Harshness NVH ; Gearmesh Frequency GMF ; Power Spectrum; BLDC-motor;

    Abstract : This thesis aims to use vibration and acoustic noise analysis to help a production line of a certain motor type to ensure good quality. Noise from the gearbox is sometimes present and the way it is detected is with a human listening to it. This type of error detection is subjective, and it is possible for human error to be present. READ MORE

  5. 9. Acoustic Radiation Of An Automotive Component Using Multi-Body Dynamics

    University essay from KTH/Fordonsdynamik

    Author : Shayan Aghaei; [2020]
    Keywords : NVH; Acoustic Simulation; Multibody Dynamics; Automotive;

    Abstract : An important facet of creating high-quality vehicles is to create components that are quiet and smooth under operation. In reality, however, it is challenging to measure the sound that some automotive components make under load because it requires specialist facilities and equipment which are expensive to acquire. READ MORE

  6. 10. Transfer Path Analysis of Wind Noise on a Passenger Car

    University essay from KTH/Farkost och flyg

    Author : Ren Huawei; [2019]
    Keywords : Transfer Path Analysis TPA ; Wind Noise; Principle Com-ponent Analysis PCA ; Matrix Inversion Method; Transfer Path Analysis TPA ; Wind Noise; Principle Com-ponent Analysis PCA ; Matrix Inversion Method;

    Abstract : Over the last years, due to the development of quieter engines and drivetrains, the importance of addressing the vehicle wind noise problem has significantly increased.In this thesis work, several existing Transfer Path Analysis methods have been applied on an experimental database acquired during a wind tunnel test on a passenger car with the objective of analyzing the distribution of the wind noise sources and their contribution to the target microphones located inside the vehicle. READ MORE