Damper Definition and 66 Threads

This post is somewhat of a continuation of this other post. I would like to better understand induction and be able to link the electrical equations with Newton's. For reference, this is a paper about the Eddy Current Damper I would like to study first. I think these components are very well...

Can someone help me evaluate an idea that I have? I'm investigating the idea of placing a very progressive pull spring and a digressive shock on a rocker to control the timing and rotation of an axle. I could be way off, but here's the scenario in my head. Both shock and spring are being...

Figure: Attempt at a solution: $$b=12\, \textrm{m},\quad H=8\, \textrm{m}$$ a) $$F_H=p_{CG}A=3767040\, \textrm{N}=\boxed{3767,04\, \textrm{kN}}$$ $$A=8\cdot 12=96\, \textrm{m}^2$$ $$p_{CG}=\rho_g h_{cg}=39240\, \textrm{Pa}$$ b) $$F_V=mg=\rho_g V$$ We calculate ##\theta \rightarrow 8=10\cdot...

Hi, I'm not quite sure if I'm correct. I need to find the boundary conditions for 2 ropes ##T_1 \mu_1, T_2 \mu_2## fixed at ##x=0## to a massless ring with a massless damper of force ##F_d - -bv_y## Here what I think, since the ring and the damper is massless ##\sum F_y = 0##. Thus, ##-T_1...

Ok, the last time I did something with physics, save for simple in-game simulation of gravity, was many moons ago in high school. I certainly did not learn to do this in high school, although two subjects I had there at a basic level, are touched: Waves and Classical mechanics. I have no idea...

The other day when I solved a spring mass damper system in Matlab, I was curious how in olden days would have people solved the equation. We all know the 2nd order differential equation of the system: However if I know the time, damping coefficient, stiffness and mass, will I be able to find...

Good evening, I have been wrestling with the following and thought I would ask for help. I am trying to come up with the equations of motion and energy stored in individual suspension components when a wheel is fired towards the car but, there is a twist! I am assuming a quarter car type...

I was reading the difference in construction between a car clutch (dry, single plate) and a motorcycle clutch (wet, multiplate). I understand wet multiplate clutches do not have torsional springs in them. How is the Engine vibration damped then? Can we not use this same arrangement in a car?

This is not actually an automotive project but the thread should suit practical petrolheads and the like, I think. My problem is that our front garden gate needs a strong spring so that it will shut and latch itself reliably and prevent our (visiting) dog from getting out onto a fairly busy...

Hello, In problems that involve springs and viscous dampers, eg a mass falls on a spring that also has a viscous damper, how can we calculate the energy absorbed by the damper? I mean, we know the energy absorbed by the spring (1/2*k*x^2), we know the kinetic energy of the mass (1/2*m*u^2)...

Hello all, I'm trying to calculate the pressures exerted back on a piston by a working hydraulic fluid in a damper system. I've attached a drawing of the system and the equations I'm using. Essentially the piston motion is restricted by flow through an orifice. I have data for the flow rates...

Is it possible to create a material that will block an electric field like mu-metal blocks magnetic fields?

Homework Statement Find equations of motion for mechanical system given by picture, where m = 1kg, k1 = 10, k2 = 25, b = 3 and natural lengths of springs are a1 = 1m, a2 = 2m. The whole system is in a gravitational field g = 9.81m/s^2 Homework EquationsThe Attempt at a Solution I came up with...

Hi! I have this project on my CAE classes in which I have to design a system like this, which would be in equilibrium, so i guess that the masses should move with the constant amplitude. I have no idea how to calculate the k parameter, I tried to do this analogically to mass-spring damper...

Homework Statement Diagram for a vehicle suspension is given. Displacement of wheel is given by 'x' and and displacement of body is 'y'. Spring constant, k = (7*10^4) Nm Damping coefficient, c = (3*10^3) N/m/s mass,m = 250kg a) Make a Laplace Transform of system and utilize it to predict 'y'...

Homework Statement [/B] I have this system below. It is the schematic of a linear accelerometer moving horizontally, where m is the total mass of the slide, b denotes the viscous damping, and k represents the spring constant. The relative position between the moving mass and the case is...

Hi guys. It could be an easy question but I started at the deepest. I wonder how it works like a car suspension system. How does damper work with spring? What is the difference between forced-nonforced systems? Why do we calculate frequency of spring? What does it provide us? What is the point...

Homework Statement I'm trying to derive the equations of motion and state space as well as the transfer function for a system which has two mass spring damper systems stacked on top of each other. The system is base excited. I attached a pic of the system Homework Equations - Sum of the...

Hey guys I'm trying to figure out the ideal knee speed or velocity split for a particular car that I'm designing. What I'm trying to do is relate the knee speed (or crossover speed) of my damper to the crossover point in the displacement transmissiblity graph so that I can achieve optimum...

I've been a bit lost figuring out what damper I should be using for the front suspension I am designing. Right now I'm running a wheel rate of 60 lbf/in at the front with a ride frequency of 1.2254 Hz. The front is also supporting a sprung mass of 391.68 lbf. Comfort is the end requirement of...

Homework Statement 1. The first part of the problem was to find a transfer function. Output is the displacement of the mass (mass of pinion is negligible) 2.The next thing to do was find the poles, which I believe means set the denominator=0 and solve for s. 3. The next thing to do was find...

I am quite uncertain as to why the rear damper is inclined at a angle to the inside of the car. By doing so, does one ensure for rear wheel travel to be along a curved up/down path? i.e I am perplexed as most of the modern rear suspensions are multi-link and have their dampers inclined → This...

Homework Statement The problem is to determine the transfer function where force F is input and displacement x is output in the mass-spring-damper mechanism.Homework Equations Spring Force = kx [k:spring constant] Damping Force = Cx [C:damping coefficient] Force = (Mass)(acceleration) The...

Hello, How can one calculate the dimensions of valve shims in Gas pressure shock absorber? Desription- The valve shims are orifices to the fluid flow in the hydraulic damping system. The dimensions play a very vital role in the adjustment of compression and rebound of the damper. I have...

I understand that the purpose of a damper system is to stop the spring from bouncing during rebound. But,technically speaking,I do not understand the matter of energy absorption in the damper during rebound. 1.The damper is absorbing energy during compression along the bump and dissipating...

Hi, Please tell me damper calculation.ie.how to calculate damping force??

How does one go about making a damper for a rotating system? Let's say we have a wind-up toy, and we want it to go slower, or something like that. Sorry for such a basic question, but I can't really figure out a decent way to do this. Any ideas?

Homework Statement A 10 kg block is displaced 20 mm and released. If damping coefficient is 100 N.s/m, how many cycles will be executed before amplitude is reduced to 1 mm or below? The stiffness of the spring is k=20000 N/m. Homework Equations The Attempt at a Solution I...

Hello, I have a mechanical motion platform. It's only about 8 grams and about 5x5x5 cm. I'm a bit worried about the natural frequency and I want to mechanically damp it to slightly under-damped. I'm using phosphor-bronze for my spring elements, I'm not sure how much damping is intrinsic to...

Hi, I am designing a wave energy converter, which has one degree of freedom - heaving motion. Meaning it will move only in vertical direction. My system can be considered as a Mass Spring Damper system. Thus my equation of motion is: F=Fh+Fe Where, Fe= Excitation force...

Homework Statement Write equations that could be used to solve for, V_{1}(s) \quad , \quad V_{2}(s) in the Laplace domain for the mechanical system shown in the figure attached. Homework Equations The Attempt at a Solution I think I understand most of the problem, but I think I...

Hello! I am taking a course in dynamics and have a question about a spring-mass-damper system (see the attached file) that I want to solve using Lagrange equation (see attached file). I am having trouble writing the equation of motion for this problem. At first I tried doing it the way I...

Hi guys:Imagine a spring and and damper in parallel, connected to the ground on the right, and connected by a node on the left.I never quite understand why it is said that the forces between the two must be zero.According to my professor and the textbook, it is because the node has no mass, so...

Hi, This is a real life problem I am trying to find vibration effects. I have 2 servo motors constantly going back and forth on a granite countertop. The two servo motors are moving two 75 KG masses. I am trying to solve for the vibration effects that will happen on the granite...

1. Homework Statement B, K, M 2. Homework Equations 1. xs(t) -----spring ----mass-----damper-----fixed, derive DE for x of mass given :2. F - > M -----spring-------damper ---- fixed in series, derive the DE for velocity of spring 3. The Attempt at a Solution 1. ma =...

Will a tuned mass damper damp down the excitation frequency ? Or it just reduce the vibration amplitude? Thank you.

Hi I'm a bit stuck on a problem I'm trying to figure out. I am trying to design a damper, the layout is show below: (apologies for the poor 'cad' drawing!) So far i know: I for the beam, how much energy needs to be absorbed by the damper (4500j) and the stroke (15mm). The maximum loading...

basically, I am trying to reduce vibrations from my break barrel air rifle which has dual recoils in either direction. they happen almost simultaneously, but it still throws off my accuracy as one occurs just before the pellet leaves the barrel. the kick isn't strong but rather sharp. here's a...

Please can anyone explain about underplatform damper and where it is used?

Homework Statement Consider a damped oscillator Assume that the mass is 318g, the spring constant is 104 N/m, and b = 0.106 kg/s. How long does it take for the amplitude to drop to half its initial value? M = 318 g Or 0.318 kg K = 104 N/m b = 0.106 kg/s Homework Equations n / a The...

Spring - Damper - Mass System in series fixed-----Spring-----Damper-----Mass----->F c d m --> --> x1 x2 I need help setting up the equations, I know it...

I'm sorry that post my problem picture, there is a reason that our lecturer doesn't allow this, he can find this problem using keyword included in question. the problem is i want to write state space equations also output. the sate variables x1 v1 and theta dynamic equation for mass...

Hi , I am making a shooting rest for my high power rifle and I would like to have a damper take most of the recoil energy so that the shooting rest doesn't move back or up when shooting. I attempted to calculate what damper would be appropriate for this but I am getting results that don't...

Lets assume a simple situation where there is a spring and a damper connected in parallel. We place some weight above them and begin the vibrations. The equation will then be: Mx'' = -kx -cx' -Mg So, I want to find a damper with a certain coeffitient c. I mean, that I want to find a real...

i want to know the governing equations regarding force application on a damper with damping constant D. if you provide some force f to a damper , then how much force does it transfers to the other side. f(input)------------>----------------------[d]--------------------->force output...

Homework Statement For a Helicopter landing on an undercarriage system modeled as a single spring damper. In principle, is it possible to determine K and C values for a single (constant rate) spring damper system given the mass of the helicopter and 2 independent scenarios of initial...

Hi, everyone! I'm designing pneumatic damper and I need to work out what the damping coefficient is. Basically it uses a steel rod pushing in a capped aluminium tube with a small air outlet (see diagram). I'm trying to work out what the relation is between the dimensions of the cylinder and...

I was wondering about something, and after a quick search through the forums didn't provide an answer I figured I would ask. So in modeling a spring-mass-damper system, if you have a spring and damper in series, how do you represent that? Do you have to introduce another variable, say y, at...

Can you please help me solve the equation of motion for the following diagram Thanks