Sungjin Cho

*** ****** ******, ******* *****, ***89, Illinois

+1-224-***-****

ac66tg@r.postjobfree.com

Mechanical engineer with 12+ years of experience in R&D regarding product development, mechanical design, structure simulations, and NVH(noise, vibration, and harshness) developments. Possesses Ph.D. in mechanical engineering. Status in U.S. is a Green Card holder of category, E11. Arriving in U.S. in July 2018 for immigration and looking to leverage my theoretical knowledge and practical experiences into a role as a mechanical engineer

SKILLS

Expert in measurement tool (B&K pulse, LMS testlab, LMS Sound quality, Head acoustics, Acoustic camera)

Expert in CAE (ADAMS, ANSYS, Hypermesh, OptiStruct, Sysnoise, SAMCEF, NX simulation)

Expert in CAD (NX, AutoCAD, Solidworks)

Expert in programming (Matlab)

Expert in statistical analysis (six-sigma green belt, Minitab)

Expert in Microsoft Office (e-test 965/990 score)

Good written and verbal communication (TOEIC 885/990 score)

PROFESSIONAL EXPERIENCE

SAMSUNG ELECTRONICS Suwon, South Korea

Mechanical Engineer (product development, simulation, mechanical design, and NVH) Jan 2006 – Apr 2018

Sent to Hanyang University to get Ph.D. by Samsung Academic Education Program: Mar 2013 – Feb 2017 (full-time)

Product developments of home appliances – washer and dishwasher (mainly listed products in U.S.)

- Washer model names: FlexWashTM(WV9900, WV9600 ), ActiveWashTM (WA8750, WA8650), etc.

- Dishwasher model names: DW9960, DW9550, DW9990, etc

: In projects, I had been in charge of computational simulation, NVH testing, mechanical design

Structure simulation using commercial simulation tools

- Finite element analysis (FEA)

: Static, transient, rotor dynamics, and modal analysis using NX simulation, HyperMesh and ANSYS

- Multi-body dynamic simulation for a new developing washer using ADAMS

: Establishing MBD model and analyzing dynamic characteristics for new washers

: Optimizing springs, dampers, and weight balancers for washer using design of experiment (DOE)

- Structure optimization using topography or topology method of OptiStruct

: Optimizing frame beads and volume fraction of bottom frames for washer

NVH analysis/testing – objective and subjective analysis of noise and vibration

- Frequency analysis / order analysis / modal analysis / transfer path analysis / sound quality analysis

- Measuring and analyzing time-varying, steady-state, impulsive, and abnormal sound from washer

- Sound quality index development for time-varying and steady sound based on human sensory

Mechanical designs of home appliance products using NX software

- Procuring and testing prototype parts and assemblies for tub, weight, suspension, and frame of washer

- Creating engineering change orders, purchase requisitions, bills of materials, and tracked parts using PLM.

- Geometric dimensioning & tolerancing (GD&T) and tolerance analysis

Troubleshooting & Root cause analysis / FMEA / DFMEA / DAMIC / DAMDV

- Following up and solving technical problems for home appliances focused on consumer’s claims

- Defining concepts and criteria to resolve major problems in current programs or approaches

Producing and revising testing standards and protocols for washers

- Producing and revising Samsung testing standards for washer

- Testing according to international standards (DOE, IEC, UL, ANSI, CU protocol)

Benchmarks and product tests of competitor’s home appliance products

LG DISPLAY Gumi, South Korea

Manufacturing Engineer Nov 2000 – May 2003

Planning and executing to set up automation systems for LCD new factory

- Deciding lay-out, analyzing process capability, and improving bottle neck process

- Capability calculation and analysis using Cp, Pp, Cpk, and Ppk

Implementing activities to prevent defects in unit process

- Troubleshooting & Root cause analysis / FMEA / DFMEA / DMAIC / DMADV

- Managing an yield for unit process

Developing and discovering new processes/materials for cost reduction

EDUCATION

HANYANG UNIVERSITY Seoul, South Korea

Philosophy of Doctor in Mechanical Engineering (Wave propagation, vibration, and acoustics) Mar 2013 – Feb 2017

Acquired by Samsung Academic Education Program: Mar 2013 – Feb 2017 (full-time)

Dissertation : Wave propagation control via bandgap panel with negative mass density and cloaking device composed of embedded cylinders with varying thicknesses

Research fields : performing project sponsored by National Research Foundation of Korea (NRF)

- Wave propagation analysis and control in acoustic metamaterial

- Analytical scattering method of flexural waves considering the evanescent field in a thin plate

- Analytical flexural wave cloaking method in the Kirchhoff plate

- Simulation of flexural wave cloaking via embedded cylinders with systematically varying thicknesses

- Analytical multiple scattering simulation in periodic or random structure

- Tunable two-dimensional acoustic metamaterial composed of funnel-shaped unit cells with multi-band

negative acoustic property

- Honeycomb-shaped metamaterial for minimizing noise radiation and resistance to cooling fluid flow of

home appliances

SUNGKYUNKWAN UNIVERSITY Suwon, South Korea

Master of Science in Mechanical Design Engineering (Vibration, dynamics, and simulation) June 2003 – Feb 2006

Dissertation : Ride quality analysis of a passenger car with consideration of nonlinearity of a suspension system

Research fields : performing project sponsored by Korea Automotive Technology Institute (KATECH)

- Dynamic characteristics analysis of chassis corner module of automobile

- Analysis of brake squeal noise due to nonlinearity of disk run-out

: Study on relationship between squeal noise and bifurcation phenomenon

- Nonlinear system identification using the least square method

- Nonlinear dynamic simulations of automotive using ADAMS software for ride quality

- Vibration testing: automotive suspension under harmonic or random excitations

- Rotor dynamics analysis using SAMCEF for critical speed of a turbine impeller

KUMOH NATIONAL INSTITUTE OF TECHNOLOGY (KIT) Gumi, South Korea

Bachelor of Science in Mechanical System Engineering Feb 2001

Dissertation : Active vibration control using adaptive feed-forward control algorithms

AWARD

Innovative product (FlexWashTM ) CEO award – Samsung Electronics, 2018

Distinguished manufacturing engineer award – LG Display, 2002

Best paper award – The Korean Society of Noise and Vibration Engineering (KSNVE), 2003

ADDITIONAL INFORMATION

SELECTED PEER-REVIEWED PUBLICATIONS AND SELECTED CONFERENCE JOURNALS

Sungjin Cho, Boseung Kim, Dongki Min, Yeongsuk Cho, and Junhong Park, Honeycomb-shaped meta-structure for minimizing noise radiation and resistance to cooling fluid flow of home appliances, Composite structure 155, 1-7, 2016

Sungjin Cho, Wonseok Yang, Sinyeob Lee, and Junhong Park, Flexural wave cloaking via embedded cylinders with systematically varying thicknesses, Journal of Acoustical Society of America. 139 (6), 2016

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Tunable two-dimensional acoustic meta-structure composed of funnel-shaped unit cells with multi-band negative acoustic property, Journal of Applied Physics 118, 163103, 2015

Sungjin Cho and Yeonsun Choi, Estimation of ride quality of a passenger car with nonlinear suspension, International Journal of automotive technology, Vol. 8 No. 1, 103-109, 2007

Boseung Kim, Sungjin Cho, Dongki Min, and Junhong Park, Experimental study for improving sound absorption of a composite helical-shaped porous structure using carbon fiber, Composite structure 145, 242-247, 2015

Boseung Kim, Sungjin Cho, Dongki Min, and Junhong Park, Sound absorption structure in helical shapes made using fibrous paper, Composite structure 134, 90-94, 2015

Jaehoon Lim, Sungjin Cho, Yeonsun Choi, Sungjin Choi, and Gyoojae Choi, Brake Squeal Noise Due to Disk Run-out, Transaction of KSAE (The Korean Society of Automotive Engineers), Vol. 13, No. 3, 2005

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Two-dimensional acoustic metamaterial panel composed of honeycomb-shaped cell unit, International Congress of Sound and Vibration (ICSV22), 2015

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Hybrid passive absorption metamaterial having negative material properties for high performance of sound absorption of broadband frequency and heat exhaust capability, Composite Seoul 2015, 2015

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Analytical flexural wave cloaking method in Kirch-hoff plate, Phononics 2015, 2015

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Acoustic metamaterial panel composed of funnel-shaped cell unit having multi-band negative material properties, Inter-noise, 2014

Sungjin Cho, Boseung Kim, Dongki Min, and Junhong Park, Two dimensional acoustic metamaterial having multi-band negative effective mass density, Forum Acusticum, 2014

Sungjin Cho and Junhong Park, Analytical scattering method of flexural waves considering the evanescent field in a thin plate, 166th Meeting: Acoustical Society of America, 2013

Sungjin Cho and Yeonsun Choi, Ride Quality of a Passenger Car with Nonlinear Suspension System, The Korean Society for Noise and Vibration Engineering, 2005

Sungjin Cho and Yeonsun Choi, Nonlinear Dynamic Characteristics of an Automobile Damper, The Korean Society for Noise and Vibration Engineering, 2005

Sungjin Cho and Yeonsun Choi, Vibration Reduction of Electric-powered Hand Grinder, The Korean Society for Noise and Vibration Engineering, 2004

SELECTED PATENTS (listed U.S. patents only, other nations: 50)

Iisung Bae, Myungchul Kim, Moohyung Lee, Jaeseuk Park, Sungjin Cho, Kwanjoo Myoung, and Sejin Jo, Balancer, Balancer housing, Washing machine having the same and control, Method thereof, US 2013/0327098

Hooijoong Kim, Sungjong Kim, Moohyung Lee, Jaeseuk Park, Sungjin Cho, Ilsung Bae, and Ho Choi, Washing machine and balancer thereof, US 2013/0025331

Sungjin Cho, Daeuk Kang, Jeonghoon Kang, and Kwanwoo Hong, Nozzle assembly and dishwasher having the same, US 2014/0345654

Iisung Bae, Moohyung Lee, Jaeseuk Park, Sungjin Cho, and Sungjong Kim, Motor usable with washing machine and washing machine having the same, US 2013/0025330

Jihoon Choi, Philsoo Chang, Bongwha Kwak, Jeonghoon Kang, Hoon Wee, Taejin Park, Sungjin Cho, Sangwook Kim, and Gyusung Na, Drum type washing machine, US 2010/0058816

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