Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2cm in diameter is strung between them. How many wires should each tower carry toensure structural integrity during a tropical storm? The towers are designed to withstandup to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.Assume there is no interference between the wires and take air density as 1.2 kg/m3andviscosity as 1.7×10-5 Nsm-2. If the smooth insulation on the wires is mechanicallyroughened up before application what effect it will have on the design? Also, establishwhether the wires are likely to be subjected to self-induced vibrations and if so what thefrequency would be. The frequency of such forced vibration, sometimes called self-induced vibration, may be calculated from an empirical formula due to Vincent Strouhal:fd⁄Uo = 0.198(1 − 19.7⁄Re) 250 < Re < 105 Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2cm in diameter is strung between them. How many wires should each tower carry toensure structural integrity during a tropical storm? The towers are designed to withstandup to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.Assume there is no interference between the wires and take air density as 1.2 kg/m³ andviscosity as 1.7×10$ Nsm². If the smooth insulation on the wires is mechanicallyroughened up before application what effect it will have on the design? Also, establishwhether the wires are likely to be subjected to self-induced vibrations and if so what thefrequency would be. The frequency of such forced vibration, sometimes called self-induced vibration, may be calculated from an empirical formula due to Vincent Strouhal:fd/U, = 0.198(1 – 19.7/Re)250 < Re < 105%3D

Answered: Electrical transmission towers are…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2
cm in diameter is strung between them. How many wires should each tower carry to
ensure structural integrity during a tropical storm? The towers are designed to withstand
up to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.
Assume there is no interference between the wires and take air density as 1.2 kg/m3
and

viscosity as 1.7×10-5 Nsm-2

. If the smooth insulation on the wires is mechanically
roughened up before application what effect it will have on the design? Also, establish
whether the wires are likely to be subjected to self-induced vibrations and if so what the

frequency would be. The frequency of such forced vibration, sometimes called self-
induced vibration, may be calculated from an empirical formula due to Vincent Strouhal:

fd⁄Uo = 0.198(1 − 19.7⁄Re) 250 < Re < 105

Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2
cm in diameter is strung between them. How many wires should each tower carry to
ensure structural integrity during a tropical storm? The towers are designed to withstand
up to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.
Assume there is no interference between the wires and take air density as 1.2 kg/m³ and
viscosity as 1.7×10$ Nsm². If the smooth insulation on the wires is mechanically
roughened up before application what effect it will have on the design? Also, establish
whether the wires are likely to be subjected to self-induced vibrations and if so what the
frequency would be. The frequency of such forced vibration, sometimes called self-
induced vibration, may be calculated from an empirical formula due to Vincent Strouhal:
fd/U, = 0.198(1 – 19.7/Re)
250 < Re < 105
%3D

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