Wind Design Per Asce [1

Notation projected area, sq ft force coefficient, shape factor 0.7 to 0.9 vessel effective diameter, from Table 3-4 fundamental natural frequency, 1/T, cycles per second, Hz design wind force, lb 3.5 for vessels gust effect factor, Cat A and B = 0.8, Cat C and D = 0.85

gust response factor for flexible vessels height of vessel, ft importance factor, see Table 3-1 the intensity of turbulence at height z velocity pressure exposure coefficient from Table 3-3a, dimensionless topographic factor, use 1.0 unless vessel is located near or on isolated hills. See ASCE for specific requirements overturning moment at base, ft-lb calculation factors background response velocity pressure at height z above the ground, PSF 0.00256 KzKztV2I resonant response factor calculation factors period of vibration, sec basic wind speed from map, Figure 3-1, mph basic wind speed converted to ft/sec mean hourly wind speed at height z, ft/sec equivalent height of vessel, ft minimum design height, ft, from Table 3-3

fi = structure, damping coefficient, 1% of critical damping rock or pile foundation: 0.005

compacted soil: 0.01

vessel in structure or soft soils: 0.015 a,b,c,l,e = coefficients, factors, ratios from Table 3-3

Renewable Energy 101

Renewable Energy 101

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.

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