# Recent content by MechEngJordan

1. ### I Boundary Regions in LAMMPS MD Simulation

Hi, I'm working on a project using LAMMPS. I am very new to the software and find the documentation doesn't always answer the fundamental questions I have. I noted previous LAMMPS queries were posted on this forum, although I am from a mechanical/materials engineering background. I am trying...
2. ### Kerr Diagrams for Defect Frequencies

I am currently undertaking a module in Failure Analysis, one topic of which is vibration monitoring of bearings. During this study, the notion of first and second Kerr diagrams as a tool for analysis came up. I have been trying to find additional information on Kerr diagrams; however, outwith...
3. ### Block Diagram Reduction - Control Systems Engineering

Homework Statement Determine the closed loop transfer functions of the systems shown below: Homework Equations Standard block diagram algebra. The Attempt at a Solution I've moved the take off point such that the diagram now looks like: I am having difficulty determining G1(s). The...
4. ### Calculating Transformer Input Voltage

Hi, Thanks for the reply. I should have probably clarified that in this case, Z1 = Rc // Xm and Z2 = X1eq + R1eq + a2ZL I have no issues with complex numbers or the numerical computations; I suppose what I was referring to by 'efficient' was that in the original question, there was no...
5. ### Calculating Transformer Input Voltage

Homework Statement Calculate the primary current, and hence the voltage at the transformer input winding, V1. Transformation ratio, a = N1/N2 = 0.1 R1 = 0.12 Ω; R2 = 12 Ω X1 = 0.4 Ω ; X2 = 40 Ω RC = 560 Ω V2 = 2300 V RL = 1 kΩ 'Xm = 800 Ω' Homework Equations R1eq = R1 + a2R2 X1eq = j(X1...
6. ### Engineering Calculating Voltage Source in AC Circuit

Hi, Thank you for your reply; it helped confirm my understand of the problem solution.
7. ### Engineering Calculating Voltage Source in AC Circuit

Hello, I'm currently working on a problem involving the calculation of an unknown voltage source of a circuit containing a resistor, inductor and load in series. Unfortunately, the problem sheet does not give an answer at the end, so I am unsure as to whether my approach is correct -- hence...
8. ### Engineering Specialization - Advice Needed

Hi, I'm an undergraduate engineer currently studying mechanical engineering. The first two years of my degree are core for all mechanical engineering students; however, at the end of second year, I have the option of taking a specialism in electrical engineering, offshore engineering, or...
9. ### Fluid Mechanics: Pressure Question

Thanks for the help.
10. ### Fluid Mechanics: Pressure Question

I am unsure of how I would calculate the volume -- which is particularly annoying, as I am aware that would solve my problem by application of the ideal gas law.
11. ### Fluid Mechanics: Pressure Question

Homework Statement A tyre pressure gauge indicates 20 N/cm2 for a tire at 34°C after a fast motorway run. Assuming that the volume of the air in the tyre is constant, atmospheric pressure is 760 mmHg and the air gas constant is 0.287 kJ/kg.K: i) Estimate the indicated pressure when the tyre...
12. ### As Simple Hoist System Problem - Given Answer Wrong?

Ah! I see that now. I need to be a bit more careful when reading the question! Thanks a lot.
13. ### As Simple Hoist System Problem - Given Answer Wrong?

Homework Statement A colliery lift cage can be considered as a simple hoist system. An investigation found that when raised from the bottom of the mineshaft, the cage accelerates uniformly for 10 seconds, travels for 70 seconds at constant speed of 3 m/s and just before reaching the pit head...
14. ### Dynamics Module - Kinematics Problem

Thanks. I'll be sure to brush up on differential equations and hyperbolic functions so as to better tackle problems of this sort. That makes a lot of sense, thank you. That approach from the Lagrangian formulation is really helpful.
15. ### Dynamics Module - Kinematics Problem

Hi, Thanks for the welcome and reply! This module hasn't used a second order ODE treatment for the problems -- so I hope that isn't what I'm expected to do... haha!