vibration, On the Moodle site just below the assignment you will find data from a slow, Mechanical Engineering

vibration, Mechanical Engineering

Assignment Help:

On the Moodle site just below the assignment you will find data from a slow sine sweep test conducted on a car on a "four-post" road simulator for the frequency range 0 to 20 Hz in the EXCEL spreadsheet "Ride_Comfort_Data". The response has been measured vertically on the seat rail of the driver''s seat while the front two actuators moved up and down in phase and the rear actuators remained at rest. The amplitude of the actuator motion was such that the velocity amplitude was constant throughout the frequency sweep at 100 mm/s. The response amplitude at the seat rail is measured in g.

(a) Obtain the transmissibility between the input motion of the actuators as a single input and the motion of the seat rail. Provide a graph from EXCEL showing the transmissibility.

(b) The transmissibility in (a) does not tend to 1 at low frequency as might be expected for an ideal one degree of freedom system. Explain this.

(c) Estimate the natural frequency and damping factor for the sprung mass mode involving motion of the body on the front suspension.

(d) If the diameter of the front tyres of the car is 0.6 m estimate the car speed in kph which would cause an "engine shake" problem in the car. (This will require you to identify the frequency for the engine shake mode from your graph.)

(e) In road tests on a relatively flat test track surface at 80 kph with one front wheel deliberately unbalanced, the idle shake at the seat rail position, measured using an accelerometer, was 4.2 g rms. The other three wheels were in almost perfect balance. What displacement amplitude and frequency of the front two actuators of the road simulator would be necessary to achieve the same seat rail motion in the laboratory?

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages

vibration, Mechanical Engineering

Related Discussions:- vibration

ENGINEERNING DRAWNING, HOW TO PREPARE A DRAWING IN FIRST ANGLE PROJECTION A...

Calculate the minimum thickness, A circular thin steel diaphragm having an ...

THERMAL, HOW HEAT TRANSFER TAKES PLACE

Computer integrated manufacturing, the component of computer integrated man...

Mechanics of materials, how to find bending moment diagram of cantilever be...

Stress, what is hoop stress

Derive the bending moment equation, how to solve bending moment equation

Welding transformer, Welding transformer The resistance welding transfo...

Define carbon steel, Q. Define Carbon steel? At ambient temperatures an...

Socket and spigot cotter joint, solved problems

Write Your Message!

Featured Services

Online Tutoring

Project Development

Exam Preparation

Course Help

Assignment Help

Popular Subjects

Assured A++ Grade

Academics

Major Subjects

Majors

Get In Touch

TERMS & POLICIES

HELP & SUPPORT