NVH Engineer

Si (Jeffery) Yang

***** ********** ** • Dearborn, Michigan 48120

313-***-**** • ************@*****.***

NVH Engineer • Immediately Available

Knowledge of acoustic materials, vibration dampener material, their application and usage. Experience in the field of Noise and Vibration analysis methods and multichannel data acquisition system, S&V Real Time Analysis, Data Recording and Post Processing.

Acoustics Applications - FFT Analysis, Octave analysis, Sound Intensity Mapping, Noise Source identification, Acoustic Material Intensity Mapping, Sound Power measurement.

Structural Dynamics - Modal Analysis, Operational Modal Analysis

Machine Diagnostics - Noise and Vibration measurement and analysis, Frequency Analysis, Order Analysis.

Sophisticated in 2-D building and 3-D modeling using various software tools (AutoCAD & Catia V5). Excellent skill in programming and data processing with Matlab-Simulink.

Specialist in NVH CAE modeling, simulation and parametric analysis. Ability to use CAE software: ANSYS and AMESim.

Experienced in Finite Element Modeling (FEM), Finite Element Analysis (FEA), Design Verification Plan and Report (DVP&R), Geometric Dimensioning and Tolerancing (GD&T), and Computational Fluid Dynamics (CFD).

Expertise in NVH testing, hands-on experience with microphones, tachometer, Anechoic chamber, Impact hammer, Sound Pressure Level Meter, LMS SCADAS sound intensity software, B & K pulse software, and LMS-TestLab 16A.

Educational Background

Master of Science in Mechanical Engineering – 12/2016

University of Michigan, Dearborn, Michigan GPA 3.56/4.0

Bachelor of Science in Mechanical Engineering – 04/2015

University of Electronic Science & Technology of China, Chengdu, Sichuan GPA 3.76/4.0

Significant Academic Training & Experience

CAE Simulation of the Sound Transmission Loss of Resonators and Mufflers

Built several different Helmholtz Resonators and Mufflers using Catia V5. Constructed Harmonic Response model and Harmonic Response model in ANSYS. Utilized CAE and FEA method to verify the relationship between sound transmission loss and Frequency.

Led a team of three people. Responsible for task distribution and updating.

Obtained favorable results compared with theoretical function of Resonant Frequency as well as successfully verifying results of Ansys.

Drew useful conclusions regarding structural affect on Noise Reduction Ratio and verified the relationship between parameters and Noise Reduction Ratio.

Acoustic Intensity Testing and Analysis

Probed sound intensity of small cooling fan using LMS SCADAS software. Created sound intensity maps.

Effectively identified dominant region and dominant frequency ranges of noise sources.

Analyzed the acoustic characteristics depending on SPL in the anechoic chamber.

Reverberation Measurement

Assessed acoustics of enclosed space where echoes were built up as noise was reflected and then absorbed by walls and absorption materials.

Developed innovative method to determine reverberation times that described length of time for Squeal and Rattle to decay to given level.

Acoustic Materials Sound Transmission Loss & Absorption Coefficient Measuring

Compared sound transmission loss characteristics of different acoustical materials and usefulness of air gap. Understand the importance of transmission losses in a material.

Hand on experience in using microphones, B & K pulse software, and impedance tube with pulse digital analyzer.

Found out the dominant region and dominant frequency ranges by CAE analysis of the sound intensity map.

Frequency Response Function (FRF) Measurement and Modal Analysis

Measured various FRF with varying input and output points. Hammer excitation and accelerometer data acquisition.

FRF Measurement of metal bar and free-free flat plate. Signal processing including FFT, windowing and analysis as well as animation presentation.

Successfully identified Lag Magnitudes, Real/Imagine Values, phase Angles for the bar, and damping ratio, resonant frequencies for the plate.

Order Tracking

Conducted order tracking measurement for 6-cylinder gasoline engine.

Described the sound quality based on the subjective assessment. Improved the sound quality by using different filters. Verified the domain order and domain frequency.

Professional Experience and Achievements

HP Pelzer Automotive System, Troy, Michigan

NVH/CAE Engineer-Intern, 10/2016-12/2016

Ran the inner dash tests for various vehicles

Talented at microphones calibration, test setting, data acquisition and analysis.

University of Michigan, Dearborn, Michigan

NVH Lab Assistant, 01/2016 – Now

Instruct graduates with various NVH labs and acoustic projects for Powertrain NVH Electrified Vehicles class.

Excellent at helping students to solve difficulties in the LMS Test labs with experiences. Discuss interesting problems with professor and students.

Experienced in instructing graduates with various CAE projects

Awards and Honors

Third People’s Scholarship in UESTC, TOP 20% (2010-2011, 2011-2012, 2012-2013)

Graduate Tuition Scholarship, University of Michigan, Dearborn, Michigan

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