Sound insulation test system

Abstract

The invention provides a sound insulation test system applied to the technical field of railway vehicles. The system comprises a sound insulation test chamber, a temperature control system and an acquisition test system. A partition wall in the sound insulation test chamber divides the sound insulation test chamber into a sound production chamber and a receiving chamber, and a test window for fixing a to-be-tested sample piece is preset in the partition wall; when the sound insulation test system provided by the invention is applied to a sound insulation test, the to-be-tested sample piece isfixed in the test window, and the indoor temperatures of the sound production chamber and the receiving chamber are adjusted through the temperature control system to simulate the running condition ofthe rail train running in a cold zone area; and the acquisition test system generates a test sound source meeting a preset test requirement in the sound production chamber, and acquires and receivespreset sound parameters in the chamber, so that the sound insulation effect test of the vehicle body structure in the cold zone region is completed, and the actual test requirement is effectively met.

Description

technical field [0001] The invention belongs to the technical field of rail vehicles, and in particular relates to a sound insulation test system. Background technique [0002] With the continuous improvement of the speed of rail trains, the noise generated during the running of the train is getting bigger and bigger. Therefore, how to improve the sound insulation performance of the car body structure, reduce the noise in the car as much as possible, and provide passengers with a more comfortable ride The environment has always been the goal pursued by rail train design. In practical applications, in order to fully understand and verify the acoustic design of the rail train car body structure and determine the sound insulation effect of the car body structure, it is necessary to conduct sound insulation tests on the car body structure. [0003] However, the car body structures of existing rail trains are all designed after sound insulation tests based on the premise that th...

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Problems solved by technology

[0003] However, the car body structures of existing rail trains are all designed after sound insulation tests based on the premise that the temperature difference between the inside and outside of the car body is zero degrees in a normal temperature environment. The temperature inside the car is 23°C to 25°C. There is a large temperature difference between the inside and outside of the car body structure, which will further affect the sound insulation performance of the car body structure. However, there is still a lack of corresponding test systems for the car body structure in cold regions. Therefore, how to provide a sound insulation test system to test the sound insulation effect of the car body structure under the operating conditions in frigid regions has become one of the technical problems to be solved by those skilled in the art

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