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

What do you mean by centrifugal casting, What do you mean by centrifugal ca...

What do you mean by centrifugal casting ? How are the centrifugal method classified ?

Describe inversion and mechanism, Describe Inversion and Mechanism. Illustr...

Describe Inversion and Mechanism. Illustrate in detail all inversions of 4-Bar chain Mechanism. (a) Explain all the types of constrained motion with examples. (b) Explain in

Induction pressure welding, Induction Pressure Welding In this process,...

Induction Pressure Welding In this process, the current is induced by high frequency induction process in the job. Due to electrical induction the job is heated. When a suitabl

Explain metal cutting tool, What is Metal Cutting Tool? A cutting tool ...

What is Metal Cutting Tool? A cutting tool (or cutter) is any tool which is used to remove material from the work piece by means of shear deformation. Cutting may be completed

Calculate net force on the piston, A vertical petrol engine 100mm diameter ...

A vertical petrol engine 100mm diameter and 120mm stroke has a connecting rod 250mm long. The mass of the  piston is 1.1kg. The speed is 2000 r.p.m. On the expansion stroke with a

V shaped tank, This lab sheet is designed to guide students through the exp...

This lab sheet is designed to guide students through the experimentation they will need to conduct in order to complete the continual assessment element of their NG3H235 studies.Th

Description of various sections and terminologies spark plug, Description a...

Description about Various Sections and Terminologies of Spark Plug Stud This is fixed to the insulator. The high-tension cord is also connected to this. Corrugations

Show the limitations of rigid bed models, Q. Show the Limitations of Rigid ...

Q. Show the Limitations of Rigid bed models? Due to vertical exaggeration, model slope automatically becomes steeper than in the prototype, this slope exaggeration being the sa

Loads analysis, Complete the following problem from the text by Megson.  No...

Complete the following problem from the text by Megson.  Note that since the answers are given, it is essential that you show and justify all work to receive full credit.  Required

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