Bogie suspension self-vibration characteristic test stand based on half vehicle mass simulation status

The utility model relates to railway vehicle bogie suspension self-vibration characteristic testing equipment, in particular to a bogie suspension self-vibration characteristic test stand based on half vehicle mass simulation status, which mainly consists of a test stand positioning and auxiliary supporting device, a test stand excitation loading device and a half vehicle mass simulation loading device. The test stand positioning and auxiliary supporting device is fixedly connected to the test stand concrete foundation, the test stand excitation loading device is fixedly connected with a component on the test stand positioning and auxiliary supporting device, and the half vehicle mass simulation loading device is connected with a swing bolster or air spring of the bogie to be tested and is further fixedly connected with a component on the test stand positioning and auxiliary supporting device through a connecting rod. The test stand can realizing loading of the bogie by the aid of mass blocks so as to simulate half vehicle mass. Actuators in different directions are coordinated and controlled by an electro-hydraulic servo system to excite the bogie to be tested, so that the requirements on self-vibration frequency tests for vertical and transverse vibration modes of oscillating, inclining and side rolling of the bogie structure are met.