Horizontal curves - railways, Mechanical Engineering

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.

Posted Date: 1/23/2013 12:34:25 AM | Location : United States







Related Discussions:- Horizontal curves - railways, Assignment Help, Ask Question on Horizontal curves - railways, Get Answer, Expert's Help, Horizontal curves - railways Discussions

Write discussion on Horizontal curves - railways
Your posts are moderated
Related Questions
A rigidly fixed circular bar 1.75mm long uniformly tapers from 125mm dia. at 1 end to 100mm dia. at other end. If the max. stress in the bar is not to exceed 108MPa. Find the tempe

Engine oil replacement Motorcycle is thoroughly drained by kicking the vehicle several times. Inspect the drain bolt washer and replace if necessary. Tighten the drai

Factor of Safety: Factor of safety is number used to determine working stress. It is fixed based on experimental works on material. It accounts all uncertainties like, mate

The connecting rod of a four stroke cycle Diesel engine is of circular section and of length 550 mm. The diameter and stroke of the cylinder are 150 mm and 240 mm respectively. The

how should we consider positive or negative when summation of forces

Determining the Number of Kanban Card Sets: Example: Determining the Number of Kanban Card Sets X automotive, a company that makes muffler assemblies for the Mangalore Mo

Problem: In HEC-RAS, model this system as 1 reach with cross-sections every 2 ft. For all 3 discharges (labeled as: design, low, flood), (a) Determine the water depths 10 ft fro

what is the essentials of a good boiler?


Creating 3-d solid models Two basic approaches to create solid models are :    (i)  Constructive solid geometry (CSG or c-rep), and (ii)  Boundary representation (b-rep).