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  • Users: elogesh
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  1. elogesh

    Deceleration levels of vehicle during uphill/downhill braking

    Hi, During downhill braking/uphill braking, as per the mathematical calculation, depending upon the slope angle, the deceleration will decrease of increase as sin(theta) component of vehicle weight. Is there a mechanism which will ensure the max. deceleration level of vehicle in...
  2. elogesh

    Transient response equations from modal superposition method

    Dear All, Can you share or point out the reference for the equations involved in the calculation of transient response from mode co-efficients. Is there any correspondence between the modal participation factors listed from modal analysis to the mode co-efficients from transient response...
  3. elogesh

    Fit line within the chart using Excel-VBA

    hi, I have the following data in sheet1 from A1 to B10 0 0 100 100 200 100 300 100 400 100 500 100 600 100 700 100 800 100 900 100 Used the following code to plot horizontal line in the chart1. But unable to fit the line within the chart. Option Explicit Sub Macro1()...
  4. elogesh

    Bolted connection joints - Pretension element

    Hi, In one of the analysis requirement represented bolted connections between joint members using Prets179 with contact. Beam 188 elements used for bolt connection. Bolt preload applied as the first load step and axial load applied as second load step. Bolt diameter =12 mm; Bolt pre-load...
  5. elogesh

    Fluid mass accounting in structural analysis

    Dear Experts, We are interested in calculating the modal frequency automotive oil sump filled with oil for fixed boundary condition at the bolted face with engine block.Our concern is about the representation of oil. How oil mass needs to be accounted. 1) whether we can represent oil as NSM...
  6. elogesh

    Draw graph/shape from excel-VBA

    Hi, I am begineer in Excel-VBA. Need help to plot graph. I have two set of data points (A,B) and (D,E) corresponding can also be mentioned as column (1,2) and (4,5)starting from row no.6 to row no.13 A B 0 50 1000 50 2000 50 3000 50 4000 50 5000 50 6000 50 7000 50 8000 50 C D...
  7. elogesh

    CG & moment of inertia - W.r.to co-ordiante transformation

    Dear all, In a automotive vehicle, we got the CG as well moment of inertia of the power train(engine+clutch+gearbox..) about the vehicle co-ordinate system with zero degree of rotation.When the engine is fitted into the vehicle the engine is rotated -3 deg for connecting the propeller shaft...
  8. elogesh

    Power train mount - Modal kinetic energy calculation

    Hi, would like to calculate the modal kinetic energy of Power train mount suspension modes based on FEA modal results. Power train System built as 6-dof model and hence there are totally 6 modes (Bounce, lateral, longitudinal, roll, yaw,pitch). 80% participation of individual modes ensures...
  9. elogesh

    FE analysis of steel bellows

    Hi, I am analyzing steel bellows made of SS-304 stainless steel material subjected to axial displacement +/-12mm has to withstand 0.5 million cycles. Endurance strength of the material for infinite life is approx. 160 MPa. Stress from the linear static analysis for axial load is around 400...
  10. elogesh

    Random vibration analysis- Time domain Vs. Frequency domain

    Hi all, I am associated with an heavy commercial vehicle automotive company.We do computer aided engineering for evaluating the stresses/strains and there by life of components during the product development stage. The components (mounting brackets) as per the internal standard is tested...
  11. elogesh

    Frequency response analysis specification

    Hi, This is regarding one of the specification, we came across for frequency response analysis. In one of our group analysis involved in the design and manufacture of filter systems would like to perform virtual simulation before proceeding for actual testing. The test specification is...
  12. elogesh

    Regarding mold flow simulation

    Dear all, This is regarding plastic flow simulation using mold flow software. We have a problem while running analysis with mold inserts, We tried following two approachs Approach 1 We meshed mold insert and the plastic part togeher as a single integral part in Meshing software (Hypermesh)...
  13. elogesh

    Comparison between ASTM A284 D to ASTM A283 D

    Dear Members, Our suppliers recommended us to use ASTM A284 D for a cabinet assembly. Our drawing mentions ASTM A283 D. As per as the strength & % elongation concerned, we haven't observed major difference. We would like to know, whether there will be any concerns in going for ASTM A284...
  14. elogesh

    four bar mechanism

    Dear members we are executing a simple mechanism for one of our applications.It is a four bar link mechanism, in the input link we have given a constant torque of 100 lb-in.we expect that the input link will have constant angular acceleration as per equation T= I*alpha. but we found that the...
  15. elogesh

    Kerb-strike

    Dear all, We would like to know the terminology "Kerb-strike". Can you help me in understanding the terminology "Kerb-strike"? Regards, Logesh.E
  16. elogesh

    Thermal analysis of electronic system

    Hi, This is regarding the thermal analysis of electronic system. Now a days,the application of electronic components in all industry is steadily increasing.But they should be robust enough to withstand the vibration and thermal loads. We are trying to carryout the CFD analysis of...
  17. elogesh

    Heat transfer - Helical coil heat exchangers

    Hi, This is regarding the heat transfer through helical coil heat exchangers. Pl. refer the pdf in the indicated web-site,for your reference. www.graham-mfg.com/downloads/14.pdf Ours is closely similar... Also refer following web-site...
  18. elogesh

    Flow analysis of valve with 30% valve opening

    Hi, This is regarding the flow analysis of pneumatic valve of plunger type with 30% valve opening.The objective of the analysis is detemination of pressure drop for specified mass flow rate with 30% valve opening.The fluid medium is air at normal atmospheric pressure and temperature condition...
  19. elogesh

    Random vibration analysis of PCB

    Hi, This is regarding the random vibration analysis of PCB. One of our group company is involved in the design and maufacture of PCB board for electronic circuits -UPS systems. In this regard, they are looking forward to evaluate the vibration, shock and thermal robustness of the PCB...
  20. elogesh

    Velocity, acceleration and force in a system

    Hai, I am having a moving table in a system.The table undergoes following motion, 1) Motion 1: Accleration of the table from zero velocity to max. velocity 2) Motion 2: Movement of the table at constant velocity (Zero acceleration) 3) Motion 3; Deceleration of the table from max.velocity to...

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