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

Calculate steady state response, A light cantilever of rectangular section ...

A light cantilever of rectangular section (5cm deep and 2.5 cm wide) has a mass fixed at its free end. Find the ratio of frequency of free lateral vibration in vertical plane to th

Find out its centre of gravity, Find out its centre of gravity: A squa...

Find out its centre of gravity: A square plate of uniform thickness and density is bent along M 1 M 2 till corner C coincides along with centre C′. Find out its centre of gr

Describe that energy is a point function, (a) Describe that Energy is a poi...

(a) Describe that Energy is a point function and a property of the system. (b) What is the essence of 1 st law of thermodynamics ? Write down expression for the first law appli

Describe about chain-wire and tape gauges, Q. Describe about Chain-wire and...

Q. Describe about Chain-wire and tape gauges? Chain, wire and tape gauges are fixed on structures like bridges and the weight is lowered to touch the water surface. Movable sti

What are main important terms included in the footings, What are main impor...

What are main important terms included in the footings? Term included in the footings: a. described different types of footings and the process of selecting each type, b.

Manufacturing systems and technology, The first successful numerical machin...

The first successful numerical machine tool was developed at MIT in the year:

Thermodynamics, Problem specification 5 kg of air is contained in a piston-...

Problem specification 5 kg of air is contained in a piston-cylinder device, initially at a pressure of 2MPa and a specific volume of 0.08m3/kg. The air then expands, as an ideal ga

What are the safety checks in under batteries and gear, What are the Safety...

What are the Safety consideration in under batteries and gear ? Ans: Alternator:- 1. Suspension pin with cotter pin and anti- rotation plate 2. Alternator safety cha

Disc type brake, Disc Type Brake:  As shown in Figure the disc brake ...

Disc Type Brake:  As shown in Figure the disc brake consists of a pearlitic grey cast iron disc bolted to the wheel hub and a stationary housing called caliper. Casting in tw

Applications of co2 welding, APPLICATIONS OF CO 2 WELDING CO 2 weldin...

APPLICATIONS OF CO 2 WELDING CO 2 welding is extremely useful for joining thin sheets of thickness range 1.0 to 2.0 mm because it is possible to keep the heat input low to av

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