Featured Research

from universities, journals, and other organizations

Shaking Trucks Hit Bump In The Road

Date:
May 21, 2001
Source:
University Of California, Davis
Summary:
As heavy trucks roll down the road they create dips and bumps in the pavement. When other trucks run over the bumps, they vibrate in the same way, making those hills and valleys deeper, according to research by engineer Don Margolis of the University of California, Davis.

As heavy trucks roll down the road they create dips and bumps in the pavement. When other trucks run over the bumps, they vibrate in the same way, making those hills and valleys deeper, according to research by engineer Don Margolis of the University of California, Davis.

That makes for an uncomfortable, possibly unhealthy ride for truckers, as well as damaged roads, he said.

Margolis used data on trucks and bumpy road surfaces to build a computer simulation. Although it's known that heavy trucks damage roads, no one had previously shown that the shape and pattern of bumps was so important, or that trucks reinforce the rutting damage caused by other trucks, he said. It's not yet clear whether total weight, or the way the weight is loaded on individual axles, is more important in causing damage.

Moving trucks have two types of vibration caused by road surfaces. "Rigid body" movements are bounces, rolls and heaves of the whole vehicle, with a frequency of one or two a second. "Beaming" movements are caused by bending of the truck frame, and have a higher frequency. According to the computer model, roads where trucks travel at lower average speeds develop bumps causing rigid body movement, while higher-speed stretches develop beaming problems.

The computer model shows that it is possible to distribute weight to isolate the driver's cab from beaming, or rigid body movement, but not from both, Margolis said. In fact, truckers already try to smooth their ride by adjusting the coupling between tractor and trailer, he said. This trial-and-error approach can give them better isolation from the road surface, but can break U.S. regulations that require 14,000 pounds of load to be on the front axle.

The study is published in the January issue of the journal Vehicle System Dynamics.


Story Source:

The above story is based on materials provided by University Of California, Davis. Note: Materials may be edited for content and length.


Cite This Page:

University Of California, Davis. "Shaking Trucks Hit Bump In The Road." ScienceDaily. ScienceDaily, 21 May 2001. <www.sciencedaily.com/releases/2001/05/010521072018.htm>.
University Of California, Davis. (2001, May 21). Shaking Trucks Hit Bump In The Road. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/2001/05/010521072018.htm
University Of California, Davis. "Shaking Trucks Hit Bump In The Road." ScienceDaily. www.sciencedaily.com/releases/2001/05/010521072018.htm (accessed October 21, 2014).

Share This



More Matter & Energy News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Thanks, Marty McFly! Hoverboards Could Be Coming In 2015

Newsy (Oct. 21, 2014) If you've ever watched "Back to the Future Part II" and wanted to get your hands on a hoverboard, well, you might soon be in luck. Video provided by Newsy
Powered by NewsLook.com
Robots to Fly Planes Where Humans Can't

Robots to Fly Planes Where Humans Can't

Reuters - Innovations Video Online (Oct. 21, 2014) Researchers in South Korea are developing a robotic pilot that could potentially replace humans in the cockpit. Unlike drones and autopilot programs which are configured for specific aircraft, the robots' humanoid design will allow it to fly any type of plane with no additional sensors. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Graphene Paint Offers Rust-Free Future

Graphene Paint Offers Rust-Free Future

Reuters - Innovations Video Online (Oct. 21, 2014) British scientists have developed a prototype graphene paint that can make coatings which are resistant to liquids, gases, and chemicals. The team says the paint could have a variety of uses, from stopping ships rusting to keeping food fresher for longer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Portable Breathalyzer Gets You Home Safely

Portable Breathalyzer Gets You Home Safely

Buzz60 (Oct. 21, 2014) Breeze, a portable breathalyzer, gets you home safely by instantly showing your blood alcohol content, and with one tap, lets you call an Uber, a cab or a friend from your contact list to pick you up. Sean Dowling (@SeanDowlingTV) has the details. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins