Shijin Mei, Professional Engineer

USA Citizen

650-***-**** adx3fd@r.postjobfree.com

Professional Objective

Mechanical engineer position requires versatile skills in both hand calculation and computer based finite element analysis (FEA), CAD modeling, testing, designing, manufacturing in nuclear industry.

Qualification

MS in Mechanical engineering (Finished PhD course work and Thesis from Arizona State University

More than 10 years nuclear industry experience on internal structure design of ABWR (Advance Boiled Water Reactor), pressurized water nuclear reactor (PWR). AP1000, SMR, Sodium Cooled Reactor

Experience focused on technical leadership role, for various reactor core component design/analysis, nuclear island components in different reactors.

Subject Matter expert in solid mechanics, fracture mechanics, metal fatigue, buckling, thermal, creep, seismic analysis.

Experience in ASME NQA-1, ASME Boiler Pressure Vessel Code Section III. VIII, ASME B31.1 AND ASME B31.3

Seismic analysis is based on spectrum and time history.

Software Skills Summary

Abaqus, Ansys APDL, Workbench, HyperMesh; LSDYNA, CATIA V5; Unigraphics; Pro/Engineer, Solidworks, Pro/MECHANICA; Mathcad; MATLab; C, C++; VB; MS Office; Window & Unix, Linux OS; Python, HTML, VB, XML, CSS, Confluence, Agile

Professional History

Terrapower, Seattle, WA

Code Method Development Engineer (Contract) 12/13/2022- 5/05/2023

Obtained formal Training on Sodium Cooled Reactor (LMS).

Performed code method report independent verification.

Performed control rod drop study using ANSYS explicit Dynamics.

Seismic analysis of drop module/modal frequency and harmonic response during impact

Performed parameter study and design optimization.

Make design recommendations.

Author technical report.

Use confluence/Agile tools for teamwork.

KLA, Milpitas, California

Mechanical Engineer IV (Contract) 03/13/2022- 12/13/2022

Collaborated with scientists and subject matters experts and wrote transition chamber requirement specifications, which required a strong understanding of the system.

Conduct various analysis for seismic, static, gravity loading and vacuum pressure loading.

Flexible coupler design and analysis (FEA/ANSYS).

Produced innovative ideas for flexible coupler designs and organized brain-storming meetings with a focus on problem solving.

Optical modeling using Zemax/Optics-builder/Ray Tracing.

EUV optical mechanical design and tolerance analysis.

Calculated UVO laser beam cleaning tunnel alignment tolerance with motion from stage.

Designed transition chamber with ultra-high vacuum.

Designed an inspection stage adjustment tool and generated detailed drawings.

Wrote detailed work procedures for stage tool adjustment.

Collaborated with optical mechanical engineers (SPF, UVO, EUV), system engineers and manufacturing and service engineers to ensure flawless integration.

CAD systems: Creo Parametric, NX/Teamcenter

FEA system: ANSYS22R1

ASML, San Jose, California

System Engineer/Project Manager (Project based) 02/2019- 09/2019 & 11/2021- 03/2022

Worked on multiple projects for high throughput Wafer inspection multi-beam eSource, very high-resolution inspection.

Understood the fundamentals of the technology and searched for the most frontier technologies.

Vacuum chamber design and troubleshooting for leakage.

Problem solving for arcing of high voltage charging.

Production problem solving with engineers from system, inspection, eSource.

Project manager for multiple projects: Project planning and tracking.

Work with different vendors for out-of-shelf parts.

Standardization of CAD systems (NX/Teamcenter).

Talk to vendors for linear actuator about their critical data sheet and make sure it meets requirement for the inspection module.

Design upper vacuum chamber alignment device using Solidworks.

Perform fracture mechanics analysis of water-cooling glass (Zerodur) for lithography machine using Ansys Workbench, Catia V5, UG NX Advanced Simulation and Matlab.

Investigate crack propagation such as calculate stress intensity factor and far-field stress. Estimate water seal pressure of the O-ring with hyper elastic material property.

Perform prism transient thermal distortion analysis under laser beam heating.

Perform modal, harmonic and impact analysis on the reticle stage assembly and lens assembly.

Simulate glue shrinkage induced distortion and crack of the bonded glass.

Estimate static fatigue life and proof test pressure by hand calculation.

Focus on the key problems in testing, service, manufacturing, and handling such as pressured clamp; turret; Z plug and O-ring seal, etc. of the components in the reticle stage support and handling systems.

Compile APDL macro of the heat generation for electrical chip component.

Conduct product safety and fatigue analyses per metal stress and circuit board deflection.

Answer customer inquiries and prepare technical reports.

Software used: MSC_NX/Teamcenter, Creo, ANSYS, Nastran, Abaqus

Teledyne Brown Engineering, Huntsville, Alabama

System Engineer (Project based) 03/2021- 11/2021

Work as consultant for DOE (SRNS) project at system level.

Vacuum chamber design and analysis using COMPRESS/CODEWARE/FEMAP.

Perform radiation heat transfer calculation.

Brain storming of different concepts for cooling and heat removal.

Work with electric engineers for electric control diagram for PLC (Program logic Control), sensors I/O and HMI (Human machine interface) at system level.

Cooling design using SOLIDWORKS.

Seismic qualification (section VIII).

Software used: SOLIDWORKS/COMPRESS_CODEWARE/FEMAP

Maxar Technologies, Palo Alto, California

Senior Staff Engineer (Project based) 03/2020- 03/2021

Conduct structure design and integrity evaluation of satellite ground equipment:

Projects worked: design lifting and supporting structures, using FEMAP/NX-8.1/NX11/MSC-Nastran2018.2

Calculate margin of safety of each component for relative complicated assembly; make design improvement recommendations; draft technical reports.

Prep/post-processor used: Femap/Patran; Verify mesh quality on linear and nonlinear analysis with strain energy error.

Hand calculated thermal stress of preload bolt joints; Decide dynamic or static FEA analyzing method based on the component vibration test response; Calibrate the reactions of a simple system with hand calculated shock response and transient shock response to verify shock analysis methodology for a complex system.

Evaluate structure at different load combinations: Gravity, wind/pressure load, shipping, and handling load, etc.

Analysis covered: Linear static, Non-linear contact, thermal, buckling, vibration and transient time history.

Training on satellite technologies

Solver: NX-Nastran/MSC-Nastran/ANSYS

CAD: CREO-4

Northrop Grumman, Sunnyvale, California

Stress Engineer (Contractor) 11/2019- 03/2020

Performed structural analysis for PF2 roof under wind and gravity loading.

Analyzed coupled vehicle loads, performed vibrational modal characterization of structural hardware, aeroelastic flutter analysis, and related structural dynamic simulations using NASTRAN/FEMAP.

Software used: MSC_NX/Teamcenter, Creo-2, Hypermesh, Nastran, Abaqus

Williams International, Pontiac, Michigan

Stress Engineer (Contractor) 09/2019- 11/2019

Performed transient thermal and structural analysis for shaft and turbine blade, preload stress calculation and life estimate for different load combinations (duty cycle, spinning and another thermal load).

Conducted fracture mechanics analysis for different crack sizes.

Software used: MSC_NX/Teamcenter, ANSYS19.2, CFX.

Jabil, Tampa, Florida

Lead Mechanical Design Engineer (Contractor) 08/2018- 02/2019

Perform 3-D Printing design and analysis for Desktop-Metal using Ansys Workbench and APDL.

Perform cyclic, modal, thermal and fatigue stress analysis for high precision hoisting platform.

Generate printing material properties per single layer crystal growing direction.

Verify and optimize layer printing speed and geometric design using 2D, 3D static and modal analysis.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Paragon Water Systems, Tampa, Florida

Senior Design Engineer (Full-Time) 03/2018- 08/2018

Performed thermal simulation of sintering process of carbon block; optimized sintering speed based on analysis results and made recommendations for sintering equipment redesign.

Evaluated canister structural integrity under different hydraulic pressure and provided design options for review.

Monitor burst testing of fluid system, pressure sensor installation and data acquisition systems.

Investigate failure modes of plastic pipe spin-weld process.

Work with oversea engineers about injection molding issues.

Manifold installation locations and clamping force optimization.

Perform structural integrity evaluation of other filtration components.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Ingersoll Rand, Evans, Georgia

Lead Mechanical Engineer (Contractor) 03/2017-03/2018.

Perform random, harmonic, response spectrum, transient and static thermal or structural analyses to various kinds of gas engine fuel hydraulic and pneumatic valves, pumps, nozzles, and control systems using ANSYS Workbench.

Work on a tight schedule and meet deadlines on every analysis project.

Answer client’s inquiries and present analysis results.

Author or update technical reports or presentations.

Review technical reports from vendors.

De-feature Creo-2 and Catia V5 3-D CAD model.

Create or redesign parametric geometric model with Design Modeler.

Verify mesh quality on linear and nonlinear analysis with strain energy error or σ-ε curve.

Hand calculated thermal stress of preload bolt joints.

Decide dynamic or static FEA analyzing method based on the component vibration test response.

Model and analyze aluminum frame structure to simulate weld failure during random vibration test.

Compare vibration test response with FEA output to decide component’s damping ratio during harmonic vibration analyses.

Perform stress check for the conditions of operation, proof and burst as well as high power, crash safety and shock.

Calibrate the reactions of a simple system with hand calculated shock response and transient shock response to verify shock analysis methodology for a complex system.

Calculate fatigue damage ratio (FDR), such as random vibration with 3σ stresses, NPX and Miner’s rule.

Work on new battery (Lithium Ion Battery) project, simulate battery overheat condition and check electric connection (solder ball) during vibration.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Areva Federal Service, Aiken, South Carolina

Principal Civil Structure Engineer (Full-Time) 12/2014-03/2017

Perform platform equipment, building structure integrity qualification under seismic loading (ANSYS/ABAQUS).

Work related to weld/bolt/anchor plate/frame structure/beam/piping qualification.

Macro writing for CFD/vibration/stress/ASME/ANSYS APDL.

Weld strength calculation for steel structures.

Consultant for civil structure layout dept.

Work includes wind load generation, EPR FEA model check and modification.

Wrote ANSYS macros for static and dynamic loading, spent fuel pool load generation (hydraulic calculation, structure in submerged condition) and critical section selection.

EPR ANSYS model check and improvement.

Software used (intensively used): ANSYS10.0 and ANSYS15.0 AND 17.0

GSI Consultants Inc., Homestead, Pennsylvania

Engineering Consultant/Director (Contractor) 04/2014-12/2014

Analyzed AP1000 (nuclear power station) modular wall.

Develop FEA sub-model of CA05.

Evaluate modular wall for different load combinations (dead weight, wind, flood, and seismic loading).

Developed VB excel sheet for results post-processing (using ACI349 code).

Software used: MSC_NX, Cre, ANSYS, Nastran, Abaqus

B&W mPower, Lynchburg, Virginia

Lead Mechanical Engineer (Contractor) 04/2013-04/2014.

Design nuclear fuel storage unit, analyze fuel assembly drop test using LSDYNA.

Perform thermal and seismic analysis for mPower SMR reactor.

Author technical reports and coordinate designer about analysis results.

Made design improvement recommendations.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Areva NP Inc., Lynchburg, Virginia

Principal Mechanical Engineer (Full-Time) 05/2011-10/2012 & 12/2012-04/2013

Design, analyze Areva and Westinghouse fuel assembly of PWR using company’s internal finite element code.

Generate load time history for further studies.

Thermal analysis for fuel rods.

Perform detailed analysis of fuel bundle under seismic (SSE/OBE), LOCA, decay and other load conditions, CFD, fluid structure interaction between fuel assembly and shroud.

Fuel assembly rework study: analyzed fuel assembly stress during rework operation.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Nuscale Power Inc. Reactor Internal, Corvallis, Oregon

Seismic Stress Engineer (Regular) 09/2010-04/2011

Perform structural integrity analysis for small modular nuclear power stations.

Analysis included: steam generator tube forming/buckling analysis, reactor internal component stress analysis, supporting structure seismic analysis using ASME CODE SECTION III NA/NB/NC/ND/NF/NG.

Fluid flow analysis: fluid pressure drop calculation within steam generator.

Steam generator piping line design and analysis.

Make design proposal/recommendation for supporting structures.

Nuclear island system design/analysis under seismic/LOCA/DECAY loading conditions.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Oracle (Sun Micro), Sunnyvale, California

Stress Engineer (Contractor) 04/2010-10/2010

Work on supercomputer server/storage seismic evaluation.

Get 3-D CAD data from Sun Micro and prepared FEA (ANSYS) model for seismic evaluation.

Project highlight: Server/storage system consists of several hundreds of disk drives and anchored to rack and a lot of wire connection between drives. The goal is to check if critical server/storage system will fail to read data from drive during earthquake and other vibration conditions.

Make design recommendations based on analysis results.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Westinghouse Electric Company, San Jose, California

Principal Mechanical Engineer (Full-Time) 03/2008 - 04/2010

Work on BWR/ABWR/AP1000 projects.

ABWR nuclear power plant (STP) Airplane (Boeing 747) impact assessment.

Built ABWR concrete containment building model w/ spent fuel pool, simplified airplane model, and performed airplane impact assessment based on different airplane speed and impact locations.

Fatigue usage calculation for welded structure under seismic loading

Work on DCD of STP ABWR project: Interface with licensing/I&C, PRA, radiation, and design/fabrication group and communicated with NRC about work progress.

AP1000 shield building design analysis (DCD), developed ANSYS Macro for loading generation for ANSYS-LSDYNA, run linear static, nonlinear elastic/plastic, benchmark concrete model with test results and ABAQUS level 3 model.

Performed reactor core CFD analysis using ANSYS CFX, built simplified CFD model for by-pass fluid temperature calculation and used it as input for thermal fatigue calculation.

AP1000 reactor internal core barrel/nozzle/flange assembly thermal stress and fatigue analysis, developed a lot of ANSYS macros for thermal transient and fatigue calculations based on different operation conditions and calculate fatigue usage based on all kinds of loading conditions.

Software used and evaluated: NX, ANSYS11.0/LSDYNA/Hypermesh/AUTODYN

BAE Systems, Santa Clara, California

Senior FEA Engineer (Contractor) 06/2007-03/2008, 10/2012-01/2013

Perform different FEA analyses for military ground vehicles (ICV, FRMV and MPV); FCS (Future Combat System): ICV structural dynamics simulation.

The PSD of ICV sub-system, up to 1000 Hz, is obtained for fatigue analysis and durability prediction using NASTRAN and I-DEAS.

Welding stress calculation for all the joints for MPV and MGV, mobility study for recovery vehicles, stress calculation for lifting crane under different load combinations.

Loads calculation of ICV/FRMV vehicles running over cross-country terrains at various speeds.

Generated the load time history for structural transient analysis.

Generated the simultaneous loads at maximum loads event for static analysis, Bolt evaluation using strain energy method.

Calibrate strain of the full-scale static test of vehicle body frame structures.

Optimize structures by hand calculation and Patran/Nastran static analysis.

Validate and compare testing result with prediction of FEA analysis and material allowable.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

GE Nuclear, San Jose, California

Senior Mechanical Engineer (Contractor) 10/2006-03/2007

Perform structural analysis for PWR suction strainer projects.

Finished six projects for clients including: TP4, St Lucie1&two, and Diablo.

Equipment design, piping, and support design.

Analysis covered: equipment component stress under static/seismic loading/thermal stress, weld/bolt stress calculation, strainer piping support analysis, spectrum analysis (frequency domain method), pressure mapping macro for steam dryer, equipment, anchor bolts and concrete foundation qualification.

Software used: ANSYS10.0

Code used: AISC690, ACI349, and ASME SECTION III NA/NB/NC/ND/NF/NG

Magnecomp Precision Corp. (Now TDK), Temecula, California

Senior Principal Mechanical Engineer (Full-Time) 09/1997-10/1999, 04/2001-09/2006

The Company makes sub-assembly of computer hard disk drives (HDD), specifically, high-tech sheet metal stamped suspensions.

CAE (FEA) developer, involved in suspension assembly design and FEA modeling.

Analyses include thermal and mechanical static, transient, modal, random, spectrum response, harmonic and shock per customer specification for hundreds of load cases.

Train junior engineers on hand calculations and FEA.

Organize DFM for proposed designs and drawing release.

Organize new production introduction for the internal and customer's designs.

Organize DVT test and monitor prototype build.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

31 U.S.A Patents Granted

Ford Motor Company, Dearborn, Michigan

CAE Engineer 10/1999-04/2001

On-site CAE (FEA) developer for Ford Motor Company.

Initial duties/assignments in Ford: CAE (FEA postprocessor) developer in the automobile stamping process, which requires the knowledge of CAE (FEA), sheet metal plastic forming mechanics (Plasticity) and C++ programming, Simulation covered gravity, binder wrap, spring back and multistage forming simulation.

Provide design and FEA technical support for the automotive stamping die design to the functions of product engineering, manufacturing, and QA. Focused on the parts and assemblies that failed under test or service.

Capable of managing multiple FEA projects by reviewing product specifications and technical request documents, conduct technical conversation with customers, team members to establish performance estimations and optimized design specifications, collecting and analyzing lab test results and trouble shoot inside prototype model shop.

Software used: MSC_NX, Creo, ANSYS, Nastran, Abaqus

Arizona State University, Tempe, Arizona

Graduate Research Assistant 09/1995-08/1997

G-10CR composites property (Young’s modulus and other constant calculation) calculation.

Design and installed thermal contact resistance measurement system (vacuum system design, piping system design, testing and data acquisition system using GBIB), which needs comprehensive knowledge about I&C, thermocouple selection.

LabVIEW real time data acquisition.

Authored and co-authored three papers.

Software used: ANSYS, Nastran

Education, Training & Engineering Licenses

Master of Science, Mechanical & Aerospace Engineering, 12/97, Arizona State University, Tempe, Arizona

oFinished PhD course work and thesis.

Master of Science, Material Science and Engineering, 3/89, Harbin Institute of Technology, China

Leadership Academy, 2005-2006, University of California Riverside

Technical Management, 2015-2016, University of South Carolina Aiken

ASME member since 1995

Formal training on Ansys, Lsdyna, Dynaform, Patran, Nastran and Abaqus, NX/Teamcenter, Pro/MECHANICA and Pro/E, Solidworks, HyperMesh.

Georgia State registered Professional Engineer in mechanical engineering and material engineering, 2017.

Virginia State registered Professional Engineer in mechanical engineering and material engineering, 2013.

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