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The Use of Mechanical and Electric Measuring Technology on Model Test

Author: TangHongBin
Tutor: WuKangXiong
School: Changsha University of Science and Technology
Course: Mechanical Design and Theory
Keywords: Electrical Testing Technology CFST Truss Arch Bridge Model test Tensile Test Systems Vibration Testing System Similarity theory Modal Analysis
CLC: U441
Type: Master's thesis
Year: 2004
Downloads: 102
Quote: 1
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Abstract


Electrical Testing Electrical measurement technology is a general term for technology and testing techniques in research, production and daily life and the cause of national defense increasingly important role . In this paper CFST Truss Arch Bridge engineering background model tests carried out tensile test systems and vibration test system design and model tests carried out , following results were obtained : ( 1 ) Use the similarity theory of the CFT truss arch model design and production. ( 2 ) Use the strain measuring principle to produce their own force sensor, and designed a tensile test system. The system is able to accurately and quickly and easily model the measured tension tendons and stay cables . ( 3 ) Design of vibration test systems. The system can detect the vibration signal , and be able to analyze the test data processing , resulting in the horizontal and vertical structure of the bridge in both directions each mode natural frequency , damping ratio and mode shapes . ( 4 ) . Were CFST Truss Arch Bridge Model Test : Through the construction process simulation , has been the construction phase of internal forces and external loads on the impact of changes in important nodes deflection law ; conducted a full-bridge static load test, the static characteristics of the bridge made ??a scientific evaluation , a brief analysis of deflection, strain variation ; were taking two , three truss pieces, assembling a span of twice the half- bridge across tianzishan model for the maximum cantilever stiffness comparison test ; modal analysis, carried out full-bridge vibration test , the horizontal and vertical structure obtained in both directions each mode natural frequency , damping ratio and mode shapes of the bridge power characteristics make a scientific evaluation and explores the forces on the structural dynamic performance. In this paper, test , based on theoretical analysis as a means designed tensile test systems and vibration testing system meets the requirements of the model tests . The success of that type of model experiment design and calculation of the bridge to provide a basis for its conclusions the same type of bridge structure design studies for reference.

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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