What is the combined stiffnes, Mechanical Engineering

Assignment Help:

A competitor in a hill-climb event finds during practice that his car becomes airborne at a particular point on the hill.  Shortly after landing the lowest point in the car just contacts the road.   The mass of the car is 2000 kg and the suspension is designed to give a natural frequency of 1.3 Hz.  The static ground clearance is 100 mm.  The dampers are set to give a damping ratio of 0.3 of critical damping.

(a)  What is the combined stiffness of the suspension springs?

(b)  What is the damping coefficient of one of the dampers assuming they are identical?

(c)  Determine the minimum ground clearance after impact which would result if the damper settings were increased by 25%. 

You should assume that the car can be treated as a one degree of freedom system for the transient that occurs when it hits the ground.  You should assume that the suspension springs are in their static equilibrium position when the car hits the ground.  You should also assume that after becoming airborne the car always hits the ground with the same downwards velocity.

Note that the transient response for a one degree of freedom system with z < 1 is given by

7_noise vibaration.png

where   x(0) and x'(0) are the initial displacement and velocity at t = 0.

You may wish to use EXCEL to solve part (c)


Related Discussions:- What is the combined stiffnes

Explain physical significance of thermal diffusivity, Derive the mathematic...

Derive the mathematical equation for Overall Heat Transfer-Coefficient through a single wall. Aslo Explain physical significance of thermal diffusivity.

Transverse wave stretched string, Transverse Wave Stretched String As a...

Transverse Wave Stretched String As a typical example of wave motion in one-dimension, let us consider the transverse harmonic waves on a long, taut string. We assume that in e

Function of heat pump, Function of heat pump: Refrigerator The pr...

Function of heat pump: Refrigerator The primary function of heat pump is to transfer heat from the low temperature system to the high temperature system, this transfer of

Estimate the air flow velocity , A smooth glass plate is coated with a spec...

A smooth glass plate is coated with a special electrically conductive film that may be used to produce a constant heat flux on the plate. Estimate the air flow velocity which must

Which three principal possible in radial drilling machine, Which three prin...

Which three principal possible in radial drilling machine Between them the plain drill machine, three principal movements are possible in this type of machine, by vertical move

Determine the two roots of equation , (i) Use the GOAL SEEK tool in MS EXCE...

(i) Use the GOAL SEEK tool in MS EXCEL to solve the following equation and determine the TWO roots of this equation between 0 X 4 -8x 3 -x 2 -14x+21=0 (ii). Use the SOLVER t

Classification-plastics-reinforced plastics and adhesives, Classification ...

Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom

Storage & quality of co2 gas, STORAGE & QUALITY OF CO 2 GAS CO 2 gas ...

STORAGE & QUALITY OF CO 2 GAS CO 2 gas is supplied in cylinders at a  high pressure (140 kg / cm 2 ). When the cylinder is full, nearly 90 % of the volume is filled with CO 2

Maintenance of bridges - culverts and shoulders, Maintenance of Bridges and...

Maintenance of Bridges and Culverts: Careful inspection of bridges and culverts at periodic intervals can detect cracks, foundation settlement, scour, malfunction of bearings

Newer approaches to on-line scheduling, Newer Approaches To On-Line Schedul...

Newer Approaches To On-Line Scheduling  The on-line scheduling has established to be superior option than off-line scheduling upon the shop floor. The on-line scheduling looks

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd