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Dynamic property testing platform for movable mass simply-supported beam

A test platform and dynamic characteristic technology, applied in vibration testing, measuring devices, testing of machine/structural components, etc., can solve problems such as no public reports, and achieve the effect of satisfying feasibility and effectiveness and avoiding motion lag

Inactive Publication Date: 2012-08-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far there are no public reports of relevant experimental platforms

Method used

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  • Dynamic property testing platform for movable mass simply-supported beam
  • Dynamic property testing platform for movable mass simply-supported beam
  • Dynamic property testing platform for movable mass simply-supported beam

Examples

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Embodiment Construction

[0018] see figure 1 , figure 2 and image 3 , a supporting member 4 is respectively arranged at both ends of the flat plate 16, and the simply supported beam 1 is installed on the supporting member 4; a mass block 2 movable on the simply supported beam 1 is placed on the simply supported beam 1, and the mass block 2 can be The stacking quantity of the mass block 2 can be adjusted; two ends of the cable are fixedly connected to the radially symmetrical position of the mass block 2, and one end of the cable is driven by a stepping motor 10, and is driven by a synchronous pulley 8 and a transmission shaft. 6 transmission, the active end wound by the active reel 5; the other end of the cable is the passive end, and a synchronous belt 15 is set between the active end and the synchronous pulley of the passive end;

[0019] The vibration acceleration sensor 18 is uniformly arranged along the moving direction of the mass block at the bottom of the simply supported beam 1, and the s...

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Abstract

The invention discloses a dynamic property testing platform for a movable mass simply-supported beam. The dynamic property testing platform is characterized in that: a supporting piece is arranged at two ends of a flat plate respectively, and two ends of the simply-supported beam are arranged on the supporting pieces at the two ends respectively; a mass block capable of moving on the simply-supported beam is placed on the simply-supported beam; two end pull ropes are fixedly connected at the radial symmetrical positions of the mass block, wherein one end pull rope is a driving end driven by astep motor, transmitted by a synchronous belt pulley and a transmission shaft and wound by a driving drum; the other end pull rope is a driven end; and vibration acceleration sensors are uniformly arranged at the bottom of the simply-supported beam along the moving direction of the mass block. The dynamic property testing platform can be used for testing the dynamic property parameters of the simply-supported beam when the mass is changed, the mass block moves at different speeds and the mass block is at different spatial positions, is used for an identification method for variable systems inparameter simulation and variable parameters in inspection, and also can be further used for active control of vibration of the simply-supported beam.

Description

technical field [0001] The invention relates to a test platform for the dynamic characteristics of a moving mass simply supported beam under the action of an excitation generating device, and more specifically relates to a test platform for the dynamic characteristics of a simply supported beam under the action of self-excitation, hammering or vibration table excitation. platform. Background technique [0002] There are many typical examples of structural systems with time-varying parameters in real engineering, such as the vehicle-bridge system formed by trains or vehicles crossing bridges, the parameter change system formed by fuel consumption during rocket launch, and the pendant system when heavy objects move on a construction site Wait. Dynamic data such as inertial parameters, modal parameters, loads, and internal stresses of these systems change with time. In order to grasp the state of these systems and control them, it is necessary to obtain their changing dynamic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/00G01M7/02
Inventor 陈恩伟陆益民刘正士王勇刘焕进周铁明
Owner HEFEI UNIV OF TECH
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