Engineering Analysis

Manjunath Siddappa

Email: *******.********@*****.***

Phone: 647-***-****

***, ****, ***** ****** ****,

Mississauga, ON L4X 1S8.

Summary of Experience

Goal oriented, business focused professional working in the engineering analysis and Validation area.

Areas of Expertise

Thermal analysis, Stress-Linear & Non linear analysis, Dynamic analysis & buckling analysis.

Good background in finite element methods. Design aspects of Aero Engine components.

Key Strengths

Effective team player and team builder, hard worker, good communication skills, willingness to accept change

Technical Skills

FEM Packages: Ansys, Hyper Mesh

CAD Tools : CatiaV4/V5

Executed some of PW in house tools for FE Model building, lifing and Test Data validation & Data reduction.

Proficiency with Microsoft Office Excel, Word and PowerPoint.

Stress Experience Summary & Areas of Expertise

• More than 6 years’ experience in finite element modelling and analysis.

• Experience in Material and Geometric non-linearity. Linear static, Modal & Buckling Analysis.

• Expertise in Solid, Shell modelling, sub modelling, assembly static and dynamic analysis.

• Bolt preload effects.

• Aircraft Loads on to the Engine

Stress Experience Summary

About The Company

Founded in 1991, Infotech Enterprises Ltd is a Global IT Services Company with over 7900 people specializing in Engineering Services, Geographic Information Systems (GIS), and IT services. We provide services to a wide range of industries - Aerospace, Automotive, Energy, Government, Hitch Consumer & Medical Devices, Marine, Rail, Retail, Telecom and Utilities. We operate from 25 global locations, including 7 development centers and accommodate the largest operations out of India for Engineering Services, Geographic Information Systems (GIS), and IT services

Infotech Software Solutions Canada Inc. -Montreal

Onsite Co-ordinator, June 2011 – Present.

• Executed projects in the area of Dynamics, nonlinear & linear structural analysis.

• To determine resonance of Rigid Fuel Manifold assembly with N2 rotor speeds.

• Life, Limit and Ultimate strength capabilities of Turbine support case for PWC engines

• Combustor Thermal and Stress analysis to predict the durability.

• Team building and Training activities

InfoTech Enterprises Ltd. – Bangalore India

November 2005 – May 2011

• Non-linear Structural Analysis of the Combustor and Casing assembly. Validation of the Stress resulting from Material and Geometric Non-linearity.

• Static and modal Analysis of various static structures and rotors.

• Sensitivity studies for some of the engine components: Setting limits for the Manufacturing without losing functionality and strength requirements.

• Thermal, Stress & Dynamic analysis of Fuel Nozzles.

Education

• Master of Technology (Materials Engineering) -National Institute of Technology, Surathkal, Karnataka, India. 2003-2005 (8.26/10 CGPA)

• Bachelor of Technology (Mechanical Engineering), Malnad College of Engineering, Hassan, Karnataka, India.1997-2001 (75 %)

Post-Graduation Study Modules

• Finite Element techniques, Strength of materials, Vibrations, Composite materials & Fatigue.

Awards/certificates

• Received an Award of approval Recognition for contribution to the Company’s objective from P&WC- Canada.

• “Team of the month” for the PW210S RFM stress analysis Project.

• Team of the month for PW980 Bearing oil tube analysis project.

Details of some of the projects handled at InfoTech Enterprises Ltd

1. PW210S Rigid Fuel manifold Assembly:

This primary objective was to investigate the reason for the failure of clamps which are mounted on the GGC. Meshing of GGC, rigid fuel assembly including fuel nozzle, adapter u-tube, inlet tube, GGC. The thermal boundary conditions were calculated based on fluid's mass flow and geometry for all operating conditions. Thermal analysis was carried out to predict the metal temperature and the stress analysis was carried out with thermal loads, pressure loads obtained for thermal analysis. A cyclic symmetry dynamic analysis for RL (worst) condition of Rigid fuel assembly was carried out to predict the natural frequencies, mode shapes and plot the Campbell diagram. Based on above analysis design modifications were suggested and incorporated.

2. High Pressure Compressor Outer Case assembly Buckling Analysis:

I performed buckling analysis of 3D sector model and 360 degrees shell model of High Pressure Compressor Outer Case in Ansys to determine the minimum thickness required that would survive ultimate compressive loads.

3. Front Center Body Case Bolted Flange assembly Static Analysis under ultimate loads:

Steady State Nonlinear Elastic Plastic bolted flange analysis of 3D 360 degrees Shell-Solid combination model at front and aft flange locations of Front Center Body Case under ultimate static and rotating loads which a bolt experience during a Fan Blade Out event and check the bolt against failure criteria.

4. Combustor Assembly life prediction for Worst Transient Conditions

Failure of combustor liners is generally produced by thermal fatigue damage. During sharply instantaneous change of temperature of the liner, there is a delay of temperature rise in the structure, and then the compressive plastic deformation at the local high temperature zones is engendered by thermal shock loading. During the continuous rising and falling of temperature by starting up and shutting down, cycles of tensile and compressive stresses are formed at these local zones and the cycles that arouse plastic damage accumulation will lead to the initiation of cracks. In this investigation, finite element method was applied to simulate the thermal cycle procedure and the response of stress-strain cycles.

5. Dynamic Analysis of PW308 Rigid Fuel Manifolds

Fuel rigid manifold replaced with the flexible one due to lower cost and weight. Both fuel manifold configurations have modes interfering with PW308C+ rotors running ranges. Because dynamics of the production manifold is different from the FER manifold due to more rigid connection so it is recommended to perform for the production configuration the Tap test. Dynamic analysis is carried out for the entire assembly to find out the natural frequency and check it against resonance criteria.

6. Fuel Nozzle Thermal and Structural Analyses of a Turbo Fan Engine

The primary objective of this analysis is to estimate the wall temperature along the fuel path of the fuel nozzle. Two configurations of fuel nozzle simplex and duplex were analyzed for different load conditions. Heat transfer coefficients were calculated by the data given by the client and thermal analysis was carried out. Iterations were carried out by modifying the fuel passage geometry, mass flow of the fuel, surrounding air temperature to keep the metal temperature of the fuel passage below 400 F. A linear static stress analysis with thermal and pressure loads to determine the stress.

Declaration

I hereby confirm that the information given above is true to best of my knowledge.

Yours Faithfully

Manjunath Siddappa.

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