| 词条 | Ground pressure | ||||||||||||||||||||||||||||||||||||||||||||||||
| 释义 |
Increasing the size of the contact area on the ground (the footprint) in relation to the weight decreases the ground pressure. Ground pressure of 14 kPa (2 psi) or less is recommended for fragile ecosystems like marshes.[4] Decreasing the ground pressure increases the flotation, allowing easier passage of the body over soft terrain. This is often observed in activities like snowshoeing. Examples{{unreferenced section|date=November 2009}}All examples are approximate, and will vary based on conditions
The pressures for adult human male and horse are for standing still position. A walking human will exert more than double his standing pressure. A galloping horse will exert up to 3.5 MPa (500 psi). The ground pressure for a pneumatic tire is roughly equal to its inflation pressure. See also
Related reading
References1. ^{{cite book | last = Allen | first = Jim | authorlink = Jim Allen (4x4 writer) | coauthors = | title = Jeep 4 X 4 Performance Handbook | publisher = MotorBooks/MBI Publishing Company | date = | location = | url = | doi = | id = SBN 076030470X | page = 16 }} {{Tires|state=collapsed}}{{phys-stub}}2. ^{{cite book | last = Wenger | first = Karl F. | authorlink = Wenger, Karl F. | coauthors = | title = Forestry Handbook | publisher = New York : Wiley | date = 1984 | location = | url = | doi = | isbn = 0-471-06227-8 | page = 499 }} 3. ^{{cite book | last = | first = | authorlink = | authors = J. William Thompson, Kim Sorvig | title = Sustainable Landscape Construction: A Guide to Green Building Outdoors | publisher = Island Press | date = 2000 | location = | url = | doi = | isbn = 1-55963-646-7 | page = 51 }} 4. ^{{cite web|url=http://coastalmanagement.noaa.gov/initiatives/media/bmp.pdf|title=Page 4 of Management of small dock and piers, best management practices, May 2005 NOAA}} 5. ^{{cite book | last = Wong | first = Jo Yung | authorlink = Jo Yung, Wong | coauthors = | title = Theory of Ground Vehicles | publisher = New York : John Wiley | date = 2001 | location = | pages = | url = | doi = | isbn = 0-471-35461-9 }} 2 : Automotive engineering|Physical quantities |
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