Determine the springs needed to absorb the energy, Mechanical Engineering

Determine the springs needed to absorb the energy:

A vehicle weighing 28 kN and running at 2.5 m/sec is to be brought to rest by a buffer springs. Determine the number of springs needed to absorb the kinetic energy if n = 20

Compression of each spring = 200 mm

Diameter of wire = 30 mm

Radius of coil = 100 mm

G = 80 GPa

Solution

KE = 1 mV 2 = 1 (28 × 103 /9.81) × 2.52  = 8919.5 N-m

Δ= 64 W R3 n / Gd 4

⇒         200 =64 × W × 1003 × 20 / (80 × 103 ) × (30)4

∴          W = 10125 N

For one spring, U = 1 W Δ = 1 × 10125 × (200/1000) = 1012.5 N-m

∴ Numbers of springs, N = KE /U= 8919.5 /1012.5= 8.8 ; 9.0

Posted Date: 1/21/2013 1:19:14 AM | Location : United States







Related Discussions:- Determine the springs needed to absorb the energy, Assignment Help, Ask Question on Determine the springs needed to absorb the energy, Get Answer, Expert's Help, Determine the springs needed to absorb the energy Discussions

Write discussion on Determine the springs needed to absorb the energy
Your posts are moderated
Related Questions
Q. Portable Gas Cylinders - Handling of Hazardous? Portable Gas Cylinders Portable gas cylinders are vulnerable to fire exposure when located in process areas. Depending on l


Principles Governing Rural Roads Design Standards: The following principles should govern in design of rural roads : (a) Rural Roads are low volume facility serving an acc

when correction couple should be applied?

Resultant of coplanar concurrent force system: The resultant force, of given system of forces can be found out by the resolution method, which is discussed below: Assume th

Scope of WPS and PQR A Welding Procedure Specification (WPS) is written qualified welding procedure prepared to provide direction for making production welds to code requiremen

Matter, particle and body: Matter is anything which occupies space, possesses mass provides resistance to any stress, example Iron, air, stone, Water. A body of negligible

Compare otto cycle with Diesel cycle: Sol.: These two cycles can be compared on the basis of either the same compression ratio or the same maximum pressure and temperature.

1. Write a short note (not more than half A4 page) on your understanding on St. Venant's Principal for your engineering design analysis. 2.  Estimate the " Stress Concentration