A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 760 kg and an average gear-tooth force of 3.00 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B, calculate the average offset of the center of mass G of the sand from the vertical centerline. Neglect all friction in the supporting rollers. Assume r = 150 mm, R = 665 mm, 0 = 24° Detail of contact at B 27² A Answer: x= i B R •G mm

A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 760 kg and an average gear-tooth force of 3.00 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B, calculate the average offset of the center of mass G of the sand from the vertical centerline. Neglect all friction in the supporting rollers. Assume r = 150 mm, R = 665 mm, 0 = 24° Detail of contact at B 27² A Answer: x= i B R •G mm

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Calculation of Settlement

The vertical displacement of the structural foundation due to the loading from the superstructure is known as settlement. It is due to the reduction of air voids present in the soil. The amount of vertical displacement depends on the bearing capacity of the soil on which the foundation is laid. The effect of the settlement depends on the magnitude of settlement, uniformity, and the structural design of the structure. The maximum allowable settlement for residential and office buildings should be less than 18 mm, for industrial buildings, it is 38 mm and for commercial buildings, it is 25 mm.

Question

A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 760 kg and an
average gear-tooth force of 3.00 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B,
calculate the average offset of the center of mass G of the sand from the vertical centerline. Neglect all friction in the supporting
rollers.
Assume r = 150 mm, R = 665 mm, 0 = 24°
Detail of contact
at B
27²
A
Answer: x=
i
B
R
•G
mm

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