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Exciting device for testing modal of large structural component

A technology for large-scale structural parts and modal testing, which is applied in the testing of machines/structural components, measuring devices, vibration testing, etc., and can solve problems such as inapplicable modal testing of large structural parts and damage to force sensors

Active Publication Date: 2013-09-18
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional excitation hammer is very easy to cause damage to the force sensor when the excitation force is too large, so it is not suitable for the modal test of large structural parts

Method used

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  • Exciting device for testing modal of large structural component
  • Exciting device for testing modal of large structural component
  • Exciting device for testing modal of large structural component

Examples

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Embodiment Construction

[0015] The present invention will be described in more detail below with examples in conjunction with the accompanying drawings.

[0016] combine figure 2 , The structural composition of the first embodiment of the present invention includes a force sensor 2, a hammer body 3 and a counterweight 1, the force sensor is installed behind the hammer body, and the counterweight is installed behind the force sensor. There is a handle on the body of the hammer, and a tup 4 is installed in front of the body of the hammer.

[0017] This embodiment is a reverse assembly force hammer proposed based on the traditional excitation force hammer. This force hammer is mainly composed of four parts: hammer head, force sensor, hammer body, and counterweight. According to the requirements of different material hammer heads, the installation sequence of the traditional excitation hammer is hammer head, force sensor, hammer body and counterweight, while the installation sequence of reverse assembl...

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Abstract

The invention relates to an exciting device for testing the modal of a large structural component. The exciting device comprises a force sensor, a hammer body and a counterweight, wherein the force sensor is arranged behind the hammer body; and the counterweight is arranged behind the force sensor. In order to overcome the defects of universal modal testing methods of the modal of the large structural component, such as a hammer method and a vibration exciter method, the invention provides the exciting device for testing the modal of the large structural component. The device plays a certain role in protecting the force sensor and can also prevent damaging the force sensor by too high vibration exciting force used for striking the large structural component.

Description

technical field [0001] The invention relates to a device for testing the dynamic performance of structural components, in particular to a component modal testing device. Background technique [0002] Modal testing is an important means to obtain the dynamic performance of structural parts, and it can also predict and diagnose the possible faults of structural parts, so as to achieve the optimization effect, so the application of modal testing in the engineering field is very common. [0003] There are many excitation methods in modal testing, such as hammer, vibrator, natural environment excitation, and working load excitation. After literature search, it is found that there are many articles that have studied it, and these articles include the various methods mentioned above to measure the mode of large structural members. The "Modal Test and Analysis of Large Wind Turbine Blades" published in "Power Grid and Clean Energy" in November 2012 uses a hammer as the excitation s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/02
Inventor 李玩幽甄珍张跃张文俊张相元孙丹
Owner HARBIN ENG UNIV
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