Author Sun; ;
Tutor Che Ying;
Degree awarding unit changchun university of science and technology;
Subject and Professional Name Instrument Science and Technology
Degree year 20 10
Master thesis level
Online publishing contributor changchun university of science and technology
The submission time for online publishing is 20 10-06- 17.
Vibration test; Fixture; Finite element analysis; Response frequency; Structural optimization; Sweep frequency test;
English keyword vibration test; Universal fixture; Finite element analysis; Response frequency analysis; Structural optimization; Frequency scanning test;
In this paper, the general test fixture of vibration test bench is taken as the main research object, the research status and development trend of vibration test fixture at home and abroad are introduced, and the application of finite element method in structural dynamic design, as well as the fixture design specification, design method, design steps and some problems needing attention are deeply studied. According to the requirements of the project, the three-dimensional finite element model of the shaking table test fixture is established by computer aided design, and the boundary conditions of the finite element model are reasonably simulated according to the use form of the test fixture in the shaking table. Using Ansys finite element analysis software, the modal calculation and frequency response analysis of the fixture are carried out, and its structure is modified repeatedly. In the modification process, the influence of the difference between the overall height of the fixture and the structural shape on the response frequency is considered, and the response frequencies of each order after changing the parameters are calculated. Finally, the structural model corresponding to the optimal response frequency is determined, so as to guide the structural design. The actual vibration test shows that the response frequency of the modified model is close to that of the design state, which meets the requirements of engineering application. The first-order vibration frequency of the whole structure of the improved model of shaking table test fixture is 13 18Hz.
Taking the general fixture of vibration test-bed as the main research object, this paper introduces the research status and development trend of vibration test-bed fixture at home and abroad, expounds the application of finite element method in structural dynamic design, and studies the application of fixture design standards, typical fixture design methods, design steps and problems needing attention. According to the requirements of the project, computer aided design is adopted. ...
DOI CNKI:CDMD:2.20 10.080366
Updated on 20 10-06-28.
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