Method for testing tension and rigidity of short derrick boom of arch bridge
A test method, short boom technology, applied in elasticity test, machine/structural component test, measurement of force by measuring frequency change of stressed vibration element, etc. Practical and other issues, to achieve the effect of simple test method, easy implementation and accurate test results
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[0017] The present invention utilizes the method of attaching a mass block on the boom to increase the identification conditions of the boom parameters, thereby calculating the tension of the boom according to the fundamental frequency and stiffness; the testing process includes the following steps:
[0018] (1), install a vibration sensor (such as an acceleration sensor) on the boom, test the vibration record under ambient vibration, and obtain the boom frequency f when the boom does not have an additional mass M through spectrum analysis 0 ;The mass weighs about 10kg;
[0019] (2) Install the mass block M on a certain section of the suspender, and record the section position l 1 , and follow step (1) to test the fundamental frequency f of the boom when the added mass of the boom is 1 ;
[0020] (3), move the installation position of mass block, repeat step (2), obtain another group of section position l 2 and boom fundamental frequency f 2 ;
[0021] (4), move the mount...
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