Testing device and testing method for coupling relationship between loss factors of damping material and energy as well as temperature

Abstract

The invention provides a testing device and testing method for coupling relationship between loss factors of a damping material and energy as well as temperature. The testing device comprises a viscoelastometer, an energy measuring device and a thermocouple device for measuring temperature. The testing method comprises the following steps: firstly, measuring the change of the loss factors of the damping material by using the viscoelastometer along with the temperature under a certain frequency and in the temperature range needing to be researched, then measuring energy difference of input and output by using a method for measuring power flow of energy, meanwhile measuring transient temperature by using the thermocouple buried in the damping material to obtain the energy consumption of the damping material, and further researching the relationship between the loss factors and the energy as well as temperature. According to the method, the method for measuring the power flow is used for calculating vibration energy, an experimental device is simple, and engineering is easily realized. The method can quantitatively describe the loss factors of the damping material, the temperature and the vibration energy. According to the method, measurement is carried out from the standpoint of energy, assumption is not needed for facilitating mathematical calculation, and therefore errors are reduced.

Description

technical field [0001] The invention relates to an experimental device and method for studying the relationship between the loss factor of a viscoelastic damping material and its vibration energy. Background technique [0002] Viscoelastic damping materials are widely used in damping structures and are effective means to control vibration, impact and noise of structures and equipment. Therefore, the ratio of the energy consumed by the damping material to the total input energy of the vibration system has important engineering significance for the evaluation of the damping performance of the damping material. The energy of viscoelastic damping materials in the process of damping vibration is mainly composed of three parts: its own kinetic energy, recoverable elastic energy and non-recoverable loss energy, among which the non-recoverable energy consumption is the symbol of its damping performance. However, due to the complexity of the mechanical structure in engineering, its ...

AI Technical Summary

Problems solved by technology

However, it adopts the method of sweeping frequency. It is assumed that the change of loss shear modulus of nonlinear viscoelastic material with frequency is negligible compared with its change with temperature. In principle, it will bring some errors to the experimental results.

Images