DYNAMIC CHARACTERISTICS OF PARALLEL LINKAGE PENDULUMS

It is found that for a parallel linkage pendulum: (1) There exists no center of percusion regardless of where the impact line is on the impacting block; but neverthelss, the summation of horizontal reaction forces in the top supporting hinges reduces drastically when the mass ratios of the impact block and the total masses of the supporing linkages is greater than one. (2) There does exist an optimum impact point to eliminate the rotational effect of the vertical reactions. The impactor would have a translational motion at the instant of impact even if it is suspended by cables when an impact is through this point. The location of this impact point is dependent upon the mass ratio of the impact block and the linkages as well as the distance from the mass center of the impactor to the level of the hinge points on the block. (3) The equivalent impacting mass of the device is equal to the sum of the block mass plus one third of the total linkage mass and it is independent of the impact location on the block. /GMRL/

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Liu, WJJ
  • Monk, M W
• Publication Date: 1976-2

Media Info

• Pagination: 6 p.

Subject/Index Terms

• TRT Terms: Dynamics; Hinges; Impacts; Mass; Network links; Pendulum tests; Rotation
• Uncontrolled Terms: Dynamic characteristics; Linkages
• Old TRIS Terms: Percussion; Reaction
• Subject Areas: Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00139746
• Record Type: Publication
• Report/Paper Numbers: SAE #760374
• Files: TRIS
• Created Date: Oct 6 1976 12:00AM