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.
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Showing 1 to 14 of 14 for “"NVH"”.
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A system engineering approach to improving vehicle NVH attribute management
… expectations for noise, vibration and harshness (NVH) are studied. Systems engineering principles, methods and tools are applied to the current processes to assess if process lead time, resources and product quality improvement can be realized. The systems engineering Design Structure Matrix (DSM) …
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Investigation and improvment of noise, vibration and harshness(nvh) properties of automotive panels
… IMPROVEMENT OF NOISE, VIBRATION AND HARSHNESS (NVH) PROPERTIES OF AUTOMOTIVE PANELS</p> <p>by </p> <p>MOHAMMAD AL-ZUBI</p> <p>July 2012</p> <p>Advisor: Dr. Emmanuel Ayorinde</p> <p>Major: Mechanical Engineering</p> <p>Degree: Doctor of Philosophy</p> <p> The reduction of noise and vibration in …
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Uncovering and avoiding failure modes in driveline and tire/wheel NVH using a computational meta-model
… approach to Noise Vibration and Harshness (NVH) development is needed to foster better decisions and support the compressed product development timing required by the market.To address this, the "Slider Bar" process and meta-model are presented. Based on the failure mode avoidance approach, …
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Implementation of a comprehensive methodology for structural dynamics and NVH simulation incorporating MBS, FEM and ray tracing
To meet the fundamental requirements of environmental preservation, mitigating noise pollution stemming from railroad vehicles is imperative. Manufacturers and operators of rolling stock exhibit a keen interest in simulation tools tailored for calculating acoustic emissions from rails and vehicles. …
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Active noise control in a luxury vehicle
… for the overall Noise Vibration& Harshness (NVH) performance of modern luxury vehicles. Currentpassive NVH solutions require structural design modifications, in order to controllow frequency sources that cause structure-borne noise. Active Road NoiseControl (ARNC) has been demonstrated to …
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Characterization of Structure-Borne Tire Noise Using Virtual Sensing
… engine noise, reducedaerodynamic related NVH), have resulted in tire road noise as the dominant source of thevehicle interior noise. Generally, vehicle interior noise has two main sources, 1) travellinglow frequency excitation below 800 Hz from road surface through a structure- borne …
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Complexity reduction in automotive design and development
… the vehicle dynamics and noise and vibration (NVH) attributes are considered. The automotive rear suspension design is used to illustrate the concepts at the detailed level of abstraction. A rear suspension system case study is included, as it met a number of the challenges inherent in …
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Development of Optimisation Methodologies for the Internal Combustion Engine Airbox
… also limited by<br/>manufacturing, assembly and NVH considerations. The complexity of the<br/>unsteady flow through the airbox and the constraints placed upon it by the<br/>available volume in the under-bonnet area make this a challenging design<br/>task.<br/><br/>This work attempts to lay the …
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Fast transfer path analysis using controlled electric motors as in-situ blocked force vibration sources
… Regarding noise, vibration and harshness (NVH), engineers require practical tools to assess, design and troubleshoot steering noise in vehicles. For acoustic development and refinement, test-based methodologies such as Transfer Path Analysis (TPA) are used to analyse noise and vibration …
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Structure-Borne Vehicle Interior Noise Estimation Using Accelerometer Based Intelligent Tires in Passenger Vehicles
… noise, vibrations, and harshness (NVH) in modern automobiles making the structure-borne noise the most crucial of the noise sources. Tire/road interaction noise being the most dominant among the structure-borne noise is the main concern of the vehicle interior noise. The two main …
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Vibration Modeling and Experimental Analysis of a Locomotive Cab
This study evaluates noise and vibrations in a heavy freight locomotive cab, and provides several measures for providing more comfort to the crew. A full-scale production cab and sill structure is used to provide the results. The cab is setup in a controlled laboratory environment in a manner …
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Finite Element Modelling of Ventilated Brake Disc Hot Spotting
Hot spotting of automotive disc brakes is an undesired thermal localisation phenomenon, which is a challenge for numerical modelling in terms of both accuracy and efficiency especially for complex disc geometry. In this research, the aim was to develop a computationally efficient finite element …
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Multiphase Electrical Machines for Vehicular Traction
L'abstract è presente nell'allegato / the abstract is in the attachment