Horizontal curves - railways, Mechanical Engineering

Assignment Help:

Horizontal Curves - Railways

In railway engineering, the horizontal curve is defined by its degree as well as by its radius. The degree is the angle subtended at the centre by a chord of 100 ft (30.5 m).

780_Horizontal Curves.png

Figure: Degree of a Curve

D = 360/2π R× 30.5

assuming that the length of chord and arc is the same.

= 1750/R

For Broad Gauge, the maximum degree of curvature permitted is 100 or 175 m radius.

When a train is travelling on a curve, the outer rail has to be raised with respect to the inner rail to counteract the centrifugal force (Figure).

866_Horizontal Curves1.png

Figure: Force on a Vehicle Moving on a Curved Path

The super-elevation (or cant) is given by the equation:

e =       V2/gR

where  e =  Superelevation,

v =  Speed in m/sec,

R = Radius in m, and

g = Acceleration due to gravity.

= V2/127 R

where  V =  Speed in Km/hr.

The maximum super-elevation provided on a BG track is 165 mm. A horizontal curve requires transitional ends.


Related Discussions:- Horizontal curves - railways

Willson hatnell governor, use, application benifits and working of willson ...

use, application benifits and working of willson hartnell governor

Duty cycle, Duty cycle The concept of duty cycle is to be clearly under...

Duty cycle The concept of duty cycle is to be clearly understood before operating any machine. Unlike the arc welding power sources, the resistance welding power sources are de

Elastomers, define elastomer.explain in details?

define elastomer.explain in details?

Insulation and heat tracing, • insulation thickness • heat tracing type (gl...

• insulation thickness • heat tracing type (glycol, electric, steam): • controlled or self-limiting • traps • identification • requirements limits

Concept of absolute thermodynamic temperature scale, (a) Write short note o...

(a) Write short note on steady flow energy equation and its applications. (b) A heat engine operating between two reservoirs at 1000k and 300k is used to drive a heat pump which

Construction of railway line, Construction of Railway Line: Earthwo...

Construction of Railway Line: Earthwork Earthwork in embankment is made up of soil from nearby borrowpits. The soil is deposited in layers of 25 cm and compacted at o

Micrometer or screw gauge-measuring tools , Micrometer (or Screw Gauge): T...

Micrometer (or Screw Gauge): There are two different types of micrometers - inside and outside micrometers. A micrometer also has two scales - Main scale and Vernier scale (Figure

Kleins construction method , How kleins construction method is different fr...

How kleins construction method is different from other type of graphical method

Theory of machines, what is coriolis component of acceleration?

what is coriolis component of acceleration?

Use of high temperature material in superheaters, Q. Use of High temperatur...

Q. Use of High temperature material in Superheaters? Typically superheaters and reheaters provide service lives of approximately 15 years (i.e. half the expected service life o

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