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

Magnitude, Magnitude, direction and position of resultant force: Q : ...

Magnitude, direction and position of resultant force: Q : A horizontal line PQRS is 12 m long, and PQ = QR = RS = 4m. Forces of 1000, 1500, 1000 and 500 N act at P ,

Cantilevered beam, A cantilevered beam is to be made of 7075-T6 aluminum ...

A cantilevered beam is to be made of 7075-T6 aluminum with a uniaxial yield strength of 469 MPa. The beam is 1m long, and is loaded with the following limit loads: a bending mome

The leader command-autocad, The Leader Command The Leader command can b...

The Leader Command The Leader command can be used to annotate at any point on a drawing. The command sequence below was used to draw the leader shown in the Figure Below.

Need of a spectrophotometer, Need of a spectrophotometer: The specific...

Need of a spectrophotometer: The specific instructions will differ with other models, but the principles remain. 1. The instrument must have been warm for at least 15 min.

Other bearing materials, Other Bearing Materials An extensively hard w...

Other Bearing Materials An extensively hard wood of great density, termed as lignum vitae, has been employed for bearing applications. Along with water as cooling and lubrican

Fluid mechanics, What is differential approach (differential formulation) i...

What is differential approach (differential formulation) in fluid mechanics? What are velocity and acceleration fields, give examples. Find, study and write down the differential f

Force analysis, explain with suitable eg. static and dynamic force analysis...

explain with suitable eg. static and dynamic force analysis

What is vertical spoilers, Q. What is Vertical Spoilers? Vertical Spoil...

Q. What is Vertical Spoilers? Vertical Spoilers - Use a three-start system of short vertical spoilers arranged in a helical pattern on the top third of the vessel. The exposed

Different relations used in belt drive, Q. W rite different relations used...

Q. W rite different relations used in belt drive. Sol: Let: D 1 = Diameter of driver N 1 = Speed of the driver in Rotation per minute D 2 = Diameter of the driv

Hill roads - road under special conditions, Hill Roads: Alignment ...

Hill Roads: Alignment Selection and Geometric Design Standards Here, you have already learnt how an alignment of a hill road has to be selected. The selection of a g

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