外力感化下的振动说课稿(国外英文资料).docVIP

外力作用下的振动说课稿(国外英文资料) The vibration of the lecture notes of 11.5 external forces The great harbor was thundered by lightning One, the textbook analysis (1) the status and function of teaching materials The vibration of the external force is the standard experimental textbook of the normal high school physics course, physics, which is the fifth section of mechanical vibration. In this section, the vibration under external force is the title, and the three vibrating modes damped vibration and forced vibration are introduced. Arrangement of the content and in the old textbooks have larger changes, not only can make students realize the damping vibration and forced vibration and resonance belong to vibration under external force, and is advantageous to the students understanding of vibration classification. (2) teaching objectives Knowledge and skills To know the transformation of energy in damped vibration and damped vibration; To know the forced vibration, the frequency of the forced vibration is the frequency of the driving force; Knowing the resonance and the conditions of resonance, knowing the application and prevention of resonance. Process and method Through experimental investigation and case analysis of damped vibration, forced vibration and resonance phenomenon, the students observation and analysis ability is cultivated. Understanding the practical application and prevention of resonance, the ability to improve the theoretical relationship. Emotional attitudes and values Through the teaching of forced vibration and resonance, the dialectical relation between internal and external causes; Through the application of resonance and the teaching of prevention, the dialectic viewpoint of penetration is divided into two. (3) the focus of the teaching The decrease of the amplitude of the damped vibration, The relationship between forced vibration and the frequency of forced vibration, Resonance and the conditions that generate resonance (4) teaching difficulties Whet