Course Name: Mechanical Measurements and Nondestructive Testing

Credit: 2

Teaching Hours：40

Experimental Hours: 36

Introduction:

This course intensively presents technologies of Strain measurement with strain gauges, Vibration Measurement and Nondestructive Testing individually in three chapters:

Experimental stress analysis is an important aspect of mechanics subject and critical for advancement and validation of theories. The first section of the course provides a preliminary introduction of principles and relevant experimental techniques of strain measurement using strain gauges. The content includes working principle of strain gauge, design of measurement circuits, usage of testing instruments, basic procedures of static and dynamic strain measurements, etc. The main objective of this section is to help students grasp primary principles and experimental methods of this widely used technique. It is expected that through the study of the part, students could deal with on their own some simple problems in experimental stress analysis.

Vibration Measurement is a multi-disciplinary subject involving vibration theory, mechanics, electronics, signal processing etc, which is based on vibration principles, and solves engineering problems related to vibration via experiments. The second section of the course covers: (1) the principles, characteristics, application scopes of the sensors and excitations for vibration measurement; (2) the theoretical analysis and measurement of the various vibration processes; (3) the modal-parameter test and dynamic signal processing techniques of the mechanical structures; (4) the basics on vibration control.

The third chapter elaborates the aims and significance of Nondestructive Testing (NDT), and its vital role in structure health inspection and evaluation. The conventional NDT methods, particularly Ultrasonics and Eddy Current are presented systematically. The principle, characteristics and application scope regarding each method are introduced in conjunction with examples on practical applications. The advanced NDT techniques are also introduced in the chapter.

Required Course in Advance:  

Mechanics of Materials; Elasticity Mechanics, Vibration Mechanics, Fundamentals of Electrotechnics, Engineering Mathematics, Electronic Circuitry, Electromagnetics

Reference:

１．           Li Fangze et al. Engineering Vibration Test and Analysis, Higher Education Press, 1992, Beijing;

２．           Hu Shiyue et al. Techniques of Mechanical Vibration and Impact Testing, Science Press, 1982, Beijing;

３．           Li Debao et al. Experimental Analysis on Engineering Vibration, Tsinghua University Press, 1993, Beijing;

４．           Cao Shuqian et al. Modal Analysis on Vibration Structures, Tianjing University Press, 2001, Tianjing;

５．           Zhang Ruyi, Lu Yaozhen. Experimental Stress Analysis, Mechanical Industry Press, 1986, Beijing;

６．           Zhang Ruyi, Shen Guanlin. Strain Measurement and Transducers, Tsinghua University Press, 1999, Beijing;

７．           Liu Guimin et al. Technology of Nondestructive Testing, National Defense Industry Press, 2010, Beijing;

８．           Li Ximeng, Nondestructive Testing, China Machine Press, 2001, Beijing;

Writer :  Yong Li