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An Effective Methodology For Suppressing Structure-Borne Sound Radiation, Lingguang Chen
An Effective Methodology For Suppressing Structure-Borne Sound Radiation, Lingguang Chen
Wayne State University Dissertations
ABSTRACT
AN EFFECTIVE METHODOLOGY FOR SUPPRESSING
STRUCTURE-BORNE SOUND RADIATION
by
LINGGUANG CHEN
December 2017
Advisor: Dr. Sean F. Wu
Major: Mechanical Engineering
Degree: Doctor of Philosophy
This dissertation is primarily concerned with the development of an effective methodology for reducing structure-borne sound radiation from an arbitrarily shaped vibrating structure. There are three major aspects that separate the present methodology from all the previous ones. Firstly, it is a non-contact and non-invasive approach, which is applicable to a class of vibrating structures encountered in engineering applications. Secondly, the input data consists of a combined normal surface velocity distribution on a portion …
Biomechanics Of Concussion: The Importance Of Neck Tension, Ron Jadischke
Biomechanics Of Concussion: The Importance Of Neck Tension, Ron Jadischke
Wayne State University Dissertations
Linear and angular velocity and acceleration of the head are typically correlated to concussion. Despite improvements in helmet performance to reduce accelerations, a corresponding reduction in the incidence of concussion has not occurred (National Football League [NFL] 1996 – present).
There is compelling research that forces on and deformation to the brain stem are related to concussion. The brain stem is the center of control for respiration, blood pressure and heart rate and is the root of most cranial nerves. Injury to the brain stem is consistent with most symptoms of concussion reported in the National Football League and the …
Development Of A Finite Element Pelvis And Lower Extremity Model With Growth Plates For Pediatric Pedestrian Protection, Ming Shen
Wayne State University Dissertations
Finite element (FE) model is a useful tool frequently used for investigating the injury mechanisms and designing protection countermeasures. At present, no 10 years old (YO) pedestrian FE model has been developed from appropriate anthropometries and validated against limitedly available impact response data. A 10 YO child FE pelvis and lower extremities (PLEX) model was established to fill the gap of lacking such models in this age group. The baseline model was validated against available pediatric postmortem human subjects (PMHS) test data and additional scaled adult data, then the PLEX model was integrated to build a whole-body FE model representing …
Toward Human-Like Automated Driving: Learning Spacing Profiles From Human Driving Data, Syed Ali
Toward Human-Like Automated Driving: Learning Spacing Profiles From Human Driving Data, Syed Ali
Wayne State University Dissertations
For automated driving vehicles to be accepted by their users and safely integrate with traffic involving human drivers, they need to act and behave like human drivers. This not only involves understanding how the human driver or occupant in the automated vehicle expects their vehicle to operate, but also involves how other road users perceive the automated vehicle’s intentions. This research aimed at learning how drivers space themselves while driving around other vehicles. It is shown that an optimized lane change maneuver does create a solution that is much different than what a human would do. There is a need …