An experimental study of the natural characteristics of the wheeled and the tracked self-propelled guns

摘要

With wheeled and tracked self-propelled guns as research object, the study carries out the experimental modal analysis by using traditional method of hammering and operational modal analysis method, and obtains low-order natural frequency of the guns, and thus lays the foundation for further research on the vibration characteristics of wheeled and tracked self-propelled guns.By contrasting the low-order natural characteristics of wheeled and tracked self-propelled guns,conclusions can draw as the following: the modal shapes (from low to high) of wheeled and tracked self-propelled guns are pitch, translation and roll; when the modal shapes are identical,the natural frequency of tracked self-propelled guns is greater than that of wheeled self-propelled guns, which accords with the test results of the gun's suspension equivalent stiffness; for wheeled self-propelled guns, an accurate measure of the gun's natural characteristics is feasible by either the traditional or the operational modal analysis method.When it comes to tracked self-propelled guns, the operational modal analysis method is more accurate.