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...
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...
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...
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...
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...
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...
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.
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...
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...
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.
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!
Thanks for the reply.
I had assumed that the question was saying that a is proportional to s, and after looking back at the lecture notes for this tutorial, I have been playing around with the idea that if
a = s
then
v\frac{dv}{ds}=s
Rearranging and integrating:
$$\int_{u}^{v} vdv =...
Hi,
I have an basic kinematics problem I can't seem to grasp -- hopefully someone can shed some light on it for me?
The acceleration, a, of an object is equal to a=s, where s is the
distance from the start position. Sketch a graph representing velocity
against distance, s, for the...