Forced-vibration damping pendulum

Abstract

A damping pendulum serves as a study object of forced vibration, the pendulum which is composed of a pendulum rod which is made of a rigid thin rod and a pendulum bob is suspended on a moving rotating shaft through a central bearing and a bearing sleeve, a driving lever is fixed on the bearing sleeve which is connected with the pendulum rod of the pendulum, and the pendulum rod of the pendulum, the bearing sleeve and the driving lever are connected into a whole. The driving lever penetrates a piston rod lantern ring of an air damping cylinder which is installed above a damping box, and the driving lever drives a piston rod to move back and forth when the pendulum swings. The magnitude of the damping force exerted on the driving lever by the piston rod of the air damping cylinder can be changed by adjusting an air flow valve on the air damping cylinder. An adjustable-speed motor is connected with the damping box through a crankshaft connecting rod system, the moving rotating shaft is driven to conduct reciprocating linear motion in the horizontal direction through a clamping opening below the damping box, and the periodic compulsive force in the horizontal direction is provided for the moving rotating shaft, so that the pendulum obtains energy required for maintaining of the stable forced vibration state.

Description

Technical field [0001] The invention relates to an experimental instrument for mechanics in physics, in particular to a forced vibration damping simple pendulum for studying the physical laws of forced vibration. Background technique [0002] Some of the existing physical experimental instruments for studying forced vibration have a common feature that uses a disk that rotates on a fixed axis, so that it torsionally vibrates back and forth around the axis of the disk under the torque of a torsion spring. A periodic external moment is used to indirectly impose a forced moment on the disc with the help of another torsion spring, so as to achieve the purpose of forced torsional vibration of the disc. The aforementioned physical experimental instruments for studying forced vibration are not adjustable due to the inherent vibration frequency of the disc vibration, and the angle of rotation is not intuitive enough, the experimental functions of the instrument are relatively simple, and...

AI Technical Summary

Problems solved by technology

The above-mentioned physical experimental instruments for studying forced vibration are not adjustable due to the inherent vibration frequency when the disc vibrates, and the observation of the angle of rotation is not intuitive enough, the experimental function of the instrument is relatively simple, and the structure of the experimental device is relatively complicated. Due to the influence of factors such as high cost and price, the popularization and application of this kind of physical experimental instruments for studying forced vibration is limited to a certain extent.

Images