KARTHIK SIRANGI

ac68yo@r.postjobfree.com ****, Beacon Hill drive,308

https://www.linkedin.com/in/karthik-sirangi/ 1-906-***-**** Auburn Hills, MI, 48084

SUMMARY

PROFESSIONAL SUMMARY

Mechanical engineering master’s graduate from Michigan Tech with emphasis on Automotive NVH, Acoustics and Noise control, seeking Full-Time. Skilled in Automotive Noise, Vibration and Harshness (NVH), Acoustic modelling, data acquisition and Structural analysis of Automotive components.

PROFILE

•2 years of experience in Vibro-acoustic testing, Data Acquisition and acoustic modelling of various consumer electronics and automotive systems using LMS Test.Lab and MSC Actran.

•Worked on Caterpillar motor grader for NVH issues using experimental and analytical vibro-acoustics.

•2 years of professional FE Modeling experience in Hypermesh, and Abaqus with proficient knowledge of FEA.

CORE COMPETENCIES:

NVH

Acoustics and Noise control

CAE and Design (3D modeling)

Fracture Mechanics

Automotive Engineering

DFSS

SKILL SET:

Analysis tools: LMS Test.Lab NI ArtemiS suit HEAD Acoustic MATLAB/SIMULINK LabVIEW MS Office

CAE tools: ANSYS HYPERWORKS ABAQUS NASTRAN ACTRAN LMS Acoustics

CAD tools: SOLIDWORKS CATIA V5 Siemens NX Pro-E Creo

EDUCATION

Michigan Technological University, Houghton, MI GPA 3.67 April 2018

MS Mechanical Engineering

Course specialization: NVH and CAE

Relevant courses: # Analytical and Experimental Vibro-Acoustics # Dynamic measurement and Signal Processing

# Analytical and experimental Modal Analysis # Acoustics and Noise control

# FEM in engineering # Engineering Fracture Mechanics # Design of Experiments (DOE)

Jawaharlal Nehru Technological University, Hyderabad, India GPA 3.7(converted) May 2015

BS Mechanical Engineering and MBA with specialization in marketing

WORK EXPERIENCE

Low-Frequency Vibro-Acoustic Study of Ski-Cabin Free-Field Technologies Troy, MI Aug-Sept 2018

Investigated the mechanisms responsible for high-noise levels at low-frequencies in the cabin.

Developed a finite element model of the ski-cabin and simulated the problem in MSC Actran software.

Analyzed the results and provided solutions to reduce the noise levels and their implications on the design.

Vibro-Acoustic Analysis of Caterpillar Motor Grader (Company sponsored) MI, Jan- May 2018

Analyzed the failure of door component of hood failing due to Fatigue stresses from engine and road vibration.

Performed Signature Analysis, computed Operational deflection shapes and analyzed the structural properties of the component with MIMO modal analysis and validated using FEA simulations in HYPERMESH and ABAQUS.

Reduced the Vibration levels by 40% for problematic frequencies and reported for design modifications.

Performed Transfer Path Analysis to determine noise transmission paths from Engine hood to driver location.

Acoustics and Noise control consultant Miscowaubik club, Calumet Jan-April 2017

Worked on Transmission loss in the building and HVAC duct acoustic modelling and noise attenuation.

Achieved 5.8 dB transmission loss by testing various materials for insertion loss in Anechoic and reverberation rooms.

Acoustical Improvement of Houghton Elementary School gymnasium Houghton, MI June-July 2017

Reduced RT60 reverberation time and improve speech intelligibility and game play experience of students.

Provided school with cost-effective solution by calibrating inexpensive, widely available noise absorption materials.

Design and FEA Intern Defense Research and Development Organization (DRDO) India May-Aug 2014

Modeled and analyzed Missile wing with varied materials using SOLIDWORKS, ANSYS and Hypermesh.

Optimized wing structure and reduced overall mass of the missile by 32% by designing structural cavity using FEA.

Provided input in the creation of component specification, component DFMEA, and technical design documents.

PROJECT EXPERIENCE

Noise Vibration and Harshness (NVH) MTU Aug 2016- may2018

Analytical and Experimental Vibro-Acoustics:

Studied: Structural dynamics, Modal analysis, Lumped parameter modeling, FEM, Modal sub-structuring and Acoustic modelling, Transfer Path Analysis (TPA), Operating deflection shapes, Statistical Energy Analysis (SEA), BSR.

Project: Sound Intensity and Operational Deflection Shapes of Clothes dryer

Performed sound intensity test using intensity probe, developed acoustic intensity map and performed ODS, modal analysis using LMS test Lab on the various components of the AC compressor to investigate noise source.

Reduced overall noise level by 4dB by installing spring damper energy dissipation system between rotor and mounts.

Project: Modal and Acoustic Analysis of Aztec Tong Drum

Worked on Analytical and Experimental comparison of cavity acoustical modes and resonances and their contribution to the instrument's performance.

Acoustics and Noise Control Michigan technological university

Studied Binaural recording and data collection using LabVIEW, HEAD Acoustics and LMS Test.Lab, Sound quality metrics. 1D acoustic simulation and acoustic tuning using GT-Power and Wave for Automotive acoustics.

Project: Sound Quality and Human Perception of Sound Using Different Consumer Grade Blenders

Measured sound quality metrics such as Sound Quality, Subjective Loudness, SPL and preferred Speech Interference level (PSIL), acoustic intensity using binaural head using HEAD Acoustics.

Performed acoustic modelling of the blenders using MSC NASTRAN and ACTRAN for sound power.

Dynamic Measurement and Signal Processing Michigan Technological University

Worked on Data Acquisition, Transducers, NVH Instrumentation, Troubleshooting, FFT, digital filtering, estimation errors, system identification, Transmissibility, calibration and recording.

Project: Determining the dominant order tracks using FFT & TVDFT methods on rotating rig (power train on dynamometer)

Acquired tachometer & Accelerometer signal and determined the speed profile & dominant orders using color-maps.

Executed time domain, order domain, signature analysis of the rotating systems using various methods.

Performed order tracking using FFT based and Time variant discrete Fourier transform (TVDFT) methods with Constant order and constant frequency bandwidth. All coding is done in MATLAB.

Design and Finite Element Analysis: Michigan technological university

Studied design (3D modelling), Fatigue Analysis Finite Element Analysis using ANSYS, HYPERMESH, NASTRAN, ABAQUS and Engineering Fracture mechanics, Structural Mechanics, Continuum Mechanics and Dynamics.

Project: Finite Element Analysis for Fatigue and Durability of Automobile Transmission Shaft

Modeled Finite element model of spline shaft with hexahedral elements in NX, LS-Dyna and NASTRAN.

Analyzed dynamic characteristics, stress distribution, Fatigue strength analysis and structural resonance and modes of shaft and achieved conclusive results and suggested improvements.

SAE Baja Competition JNTU, India, 2012-2014

Designed CAD model of steering in Creo, analyzed structural modes, loading capacity, optimized using Hypermesh.

Estimated transmission loss of an exhaust muffler by acoustic modelling with HyperMesh and Actran.

INTERESTS

Activities: Student member at Association for Iron and Steel Technology(AIST) and Association for Loud Speaker Manufacturing and Acoustics international (ALMA).

Languages: English, Hindi, Telugu.

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