Criteria

Text:
Content:
Display:

Results

Viewing 1 to 30 of 8756
2015-10-04
Event
This session focuses on innovations for improving brake NVH (Noise, Vibration and Harshness) performance. Papers and presentations involving new methods, theories, techniques, and application examples are welcome.
2015-10-04
Event
The session focusses on the fundamentals of the interaction on the sliding surface and associated friction induced vibrations. From nanoscale interactions of the contacts on the sliding interface to macroscopic methodology to diminish friction induced vibrations, this session comprises new findings and discussion toward a step forward to full understanding of the friction and brake induced vibration.
2015-08-04 ...
  • August 4-6, 2015 (2 Sessions) - Live Online
Training / Education Online Web Seminars
This web seminar provides an in-depth overview of diesel engine noise including combustion and mechanical noise sources. In addition, the instructor will discuss a system approach to automotive integration including combining sub-systems and components to achieve overall vehicle noise and vibration goals.
2015-06-26 ...
  • June 26, 2015 (8:30 a.m. - 4:30 p.m.) - Grand Rapids, Michigan
  • October 9, 2015 (8:30 a.m. - 4:30 p.m.) - Charleston, South Carolina
Training / Education Classroom Seminars
Brake noise is one of the highest ranked complaints of car owners. Grunts, groans, squeaks, and squeals are common descriptions of the annoying problem which brake engineers spend many hours trying to resolve. Consumer expectations and the high cost of warranty repairs are pushing the optimization of brake NVH performance. This course will provide you with an overview of the various damping mechanisms and tools for analyzing and reducing brake noise. A significant component of this course is the inclusion of case studies which will demonstrate how brake noise squeal issues have been successfully...
2015-06-26 ...
  • June 26, 2015 (8:30 a.m. - 4:30 p.m.) - Grand Rapids, Michigan
Training / Education Classroom Seminars
Most muffler design in the automotive industry is accomplished by using "cut-and-try" methods that rely on what has worked in the past and/or extensive full-scale testing on engines for validation. New computer software aimed at muffler design can shorten the design cycle and yield more effective results. This four hour seminar provides an introduction to the behavior of mufflers and silencers including a description of the two-port approach to muffler design. This seminar covers the acoustic simulation of muffler and silencer systems and the use of experimental methods to measure muffler performance....
2015-06-26 ...
  • June 26, 2015 (8:30 a.m. - 4:30 p.m.) - Grand Rapids, Michigan
Training / Education Classroom Seminars
The influx of different hybrid and electric vehicle configurations has brought about unique NVH challenges from a variety of sources. NVH refinement is an important aspect of powertrain development and the vehicle integration process. While developing the NVH behavior of the vehicle is critical to satisfy customer expectations, it is also important to consider the influence of reduced exterior noise levels on pedestrian safety. This seminar introduces participants to basic NVH principles and unique NVH challenges encountered in the development of HEV, ReEV, and EV including engine start/stop behavior,...
2015-06-25 ...
  • June 25-26, 2015 (8:30 a.m. - 4:30 p.m.) - Grand Rapids, Michigan
Training / Education Classroom Seminars
The sound package materials for vehicle noise control seminar provides a detail and thorough analysis of three different classes of acoustical materials – namely absorbers, barriers, and dampers, how they are different from each other, and acoustical properties that materials should possess for optimum vehicle noise control. The seminar addresses new advances in acoustical materials, primarily in absorption materials that impact the vehicle acoustics. The seminar covers ways to evaluate the acoustical performance of these materials using different test methods, including material, component, and...
2015-06-22
Event
This session is to present numerical and experimental work pertaining to noise due to flow around the vehicle body, such as flow-induced interior noise, flow over protrusions, sunroofs, windows, noise from ventilation systems, or flow noise in exhaust system. Papers on aerodynamics alone without sound are excluded. Numerical studies may include new models or models based on existing theory as long as they are adequately supported by experimental or theoretical verifications.
2015-06-22
Event
This session covers noise sources, measurement techniques, noise attenuation strategies, case studies, prediction and modeling methods, and community regulations related to drive-by noise.
2015-06-22
Event
This session is focused on the vehicle body interior noise issues caused by friction and/or impact due to the vibration of interfacing components. The papers in this session will investigate those issues through the best practice of analytical and experimental applications.
2015-06-22
Event
This session covers noise and vibration sources and paths within a vehicle (automobiles, trucks and recreational vehicles). Example of noise sources included are HVAC system, electric motor powered mechanisms and door closure and example of vibration sources are road and engine. Also included are Whole Body and Hand Arm Vibration experienced by professional drivers as well as acoustical design factors of audio, infotainment, and hands free devices.
2015-06-22
Event
This session is dedicated to the tools and methodology involved in identifying, calculating and modifying various noise and vibration sources and paths in vehicles, aircraft and various consumer products and assist in the design and validation of noise and vibration targets
2015-06-22
Event
This session covers subjective testing and analysis related to automotive noise and vibration, usually referred to as sound quality and vibration quality. The focus is on both subjective and objective tools and methods that can be used either to design sound or vibration quality into the automotive product, or to characterize and eliminate undesired sounds or vibrations.
2015-06-22
Event
This session covers sound source identification and localization, acoustical holography, sound generation mechanisms, measurement techniques related to the sound source and noise propagation, and visualization techniques for sound pressure levels, sound radiation patterns, frequency content, and intensity. Also included are prediction and modeling methods related to the sound source.
2015-06-22
Event
This session addresses the strategies and methods for implementing active noise and vibration control in a vehicle. It will cover sensors and transducers, feedback systems, control algorithms, software for active control, noise and vibration cancellation devices, noise and vibration measurement systems, and case studies.
2015-06-22
Event
This session is intended to provide a forum for review of the engineering standards being developed and their interaction with regulation that may exist on the product or systems.
2015-06-22
Event
This session covers the relationships between vibration and noise that can be generated throughout the vehicle. Included in this session are modal vibration studies related to noise, vibration transfer paths throughout the vehicle, and coupling of vibration and acoustical modes. Both experimental and analytical approaches are included in this session.
2015-06-22
Event
With the wide deployment of mobile devices and inexpensive software there are many new opportunities for engineers to inexpensively make quick test measurements with these devices. This provides new opportunities for people such as CAE engineers to make simple measurements. This session will foster the sharing of attendee’s experiences with these devices. Live demos are encouraged.
2015-04-20 ...
  • April 20, 2015 (8:30 a.m. - 4:30 p.m.) - Detroit, Michigan
  • October 8, 2015 (8:30 a.m. - 4:30 p.m.) - Charleston, South Carolina
Training / Education Classroom Seminars
Brake Noise, Vibration, and Harshness (NVH) is recognized as one of the major problems currently faced by the automotive manufacturers and their suppliers, with customers warranty claims of more than $100 million per year for each manufacturer. With increasing consumer braking performance expectations, automotive OEM’s and suppliers need the ability to predict potential problems and identify solutions during the design phase before millions of dollars have been spent in design, prototyping, and manufacturing tooling. This seminar provides an introduction to brake NVH, including a concise summary...
2015-03-17 ...
  • March 17-26, 2015 (4 Sessions) - Live Online
  • September 15-24, 2015 (4 Sessions) - Live Online
Training / Education Online Web Seminars
This four-session web seminar provides a detailed understanding of the source – path-receiver relationship for developing appropriate sound package treatments in vehicles, including automobiles, commercial vehicles, and other transportation devices. The course provides a detailed overview of absorption, attenuation (barrier), and damping materials and how to evaluate their performances on material, component, and vehicle level applications. A significant part of this course is the case studies that demonstrate how properly designed sound package materials successfully address vehicle noise issues....
2014-11-20
Event
All aspects of small engine related noise and vibration are covered in this session including: generation, experimental techniques, measurement, numerical analysis, NVH materials, source identification, NVH quality and novel solutions.
2014-11-20
Event
All aspects of small engine related noise and vibration are covered in this session including: generation, experimental techniques, measurement, numerical analysis, NVH materials, source identification, NVH quality and novel solutions.
2014-11-13 ...
  • November 13-20, 2014 (3 Sessions) - Live Online
  • May 12-19, 2015 (3 Sessions) - Live Online
  • November 10-17, 2015 (3 Sessions) - Live Online
Training / Education Online Web Seminars
This web seminar will provide an introduction to the characteristics of sound waves, human perception of sound, sound and vibration measurements, measurement facilities, and various noise sources and noise control principles. It will include an overview of sound pressure, power, intensity, decibels, and frequencies. Practical examples will be used to familiarize participants with the acoustic fundamentals for solving noise and vibration problems and the associated solution principles.
2014-11-11
Technical Paper
2014-32-0123
Vishnu Kumar Kuduva Shanthulal, Kannan Marudachalam, V Pattabiraman, S Jabez Dhinagar, Chandramouli Padmanabhan
The diesel power train (engine and transmission) is the most significant mass contributor in a three- wheeled vehicle. High idling vibrations of a single cylinder four-stroke diesel engine causes discomfort for driver and passengers as vibrations from the engine get transmitted to the structure and the body panels through the engine mounts. The isolation of these vibrations by proper design of rubber mounts is the most effective engineering approach to improve ride quality of vehicle. In the present study, a mathematical model of the powertrain and mount system is developed; the engine and transmission are assumed to behave as a rigid body (6 degrees-of-freedom) and the compliance comes from the mounts. Both four and three mount configurations have been investigated, with the mounts being represented by three independent springs in the compression and shear modes. Since the mounts can be inclined, appropriate transformations are carried out from the local mount co-ordinate system to the global co-ordinate system.
2014-11-11
Technical Paper
2014-32-0121
Kazuhiko Tanaka, Haruomi Sugita, Hibiki Saito, Masahiko Sekita
The exhaust sound of a motorcycle is one of the key appealing factors to the customers along with its styling and dynamic performances. Accordingly, various attempts have been made to realize attractiveness of exhaust sounds. Recently, there is an increasing demand to divert a common motorcycle engine to various vehicle categories. An individual engine configuration category has its own featuring exhaust sound. Despite of these circumstances, it is also required to create the best suitable sound for each vehicle category with a specific vehicle feature. Accordingly, there is a possible case in which an inline-four-cylinder engine is shared with another motorcycle model in the vehicle category with nostalgic appearances in which V-twin engine flavor is frequently featured. In this study, three essential factors were extracted from the verbal expressions that appear as adjectives, exclusively or commonly, used to illustrate the exhaust sounds in each vehicle category or engine type. We tried to develop a method applicable to various engine types to design a targeting exhaust sound, by clarifying the relationship between the position of each exhaust sound, appeared on the mapping chart for the three factors, and the feature of the waveform of the sound,.
2014-11-11
Technical Paper
2014-32-0122
Andrea Fioravanti, Giulio Lenzi, Giovanni Vichi, Giovanni Ferrara, Stefano Ricci, Leonardo Bagnoli
The intake and exhaust lines are the main elements contributing to the abatement of the acoustic emissions of an Internal Combustion Engine (ICE). Many different numerical approaches can be used to evaluate their acoustic attenuation, which is commonly expressed by the Transmission Loss. One-dimensional (1D) and three-dimensional (3D) simulations are conventionally carried out only within the acoustic domain of the muffler or the air-box. The walls of the acoustic filter are considered fully rigid and the interaction between the acoustic waves and the structure is then neglected. Moreover, the effect of the manufacturing characteristics and the attenuation of the acoustic waves due to the fluid viscothermal effects are also commonly disregarded in the numerical analysis of the filters. In addition the presence of a catalytic converter or a filter cartridge may have an influence on the numerical results. All these aspects, however, can remarkably affect the matching between simulations and experiments both at high frequencies and also at medium-low ones.
2014-11-11
Technical Paper
2014-32-0120
Sara Gronchi, Riccardo Maccherini, Raffaele Squarcini, Fabio Guglielmo, Emanuela Ligarò
In the modern both small and large size engine, the acoustic emission is a very important matter increasingly studied as per specific international standards. This paper presents the study of the acoustic emission of a hydraulic rotary oil pump by means of measurement techniques and numerical approaches. This activity aims at showing a complete test-case in which both methods are used to face a noise issue and highlighting also the “weight” of the hydraulic excitation in both cases. In particular, an oil pump has been completely characterized on a test bench to verify the hydraulic performances and the noise radiation. A structural modification has been suggested with the target of altering the noise spectrum of the pump, achieving an optimization of the noise generation. From this assumption, experimental and numerical activities have started in parallel. Measurements have been carried out by means of the intensimetric method and supported also by conventional acquisitions performed with hydraulic pressure transducers, accelerometers and microphones.
2014-11-11
Technical Paper
2014-32-0119
Diego Copiello, Ze Zhou, Gregory Lielens
This paper addresses the numerical simulation of vehicle exhaust system noise using an innovative transfer matrix method (TMM) supporting high order duct modes combined with finite element method (FEM). Exhaust systems usually consist of complex volume components (mufflers, catalyzers ...) connected by simpler pipes. The noise propagation through such systems can be efficiently addressed by means of the Transfer Matrix Method (TMM). The TMM is an analytical method which allows assessing efficiently the acoustic behavior of an entire exhaust line by combining acoustic transfer matrices of each of its constitu¬ent sub-components (i.e., volume components: mufflers, catalyzers, etc.). The main assumption of this method is that within the exhaust line only the plane wave is propagating and thus the transfer matrices could be computed analytically. On the contrary, this assumption leads to a strong limitation in the maximum frequency of analysis which is the cut off frequency of the first higher order mode present in any one of the exhaust line components.
Viewing 1 to 30 of 8756

Filter

  • Range:
    to:
  • Year: