Vibration Control Requirements for Racing Car Radiators
The radiator assembly is used to cool the components on the racing car, including radiator, condenser, intercooler, and electronic fan, etc. The racing car radiator assembly is installed at the front of the body with soft pads. The vibration generated by the imbalanced force during the rotation of the electronic fan is transmitted to the car, causing vibration and noise problems.
During the operation of the racing car, to ensure that the powertrain can maintain a suitable temperature range under all operating conditions and meet the normal use of the air conditioning system, the cooling fluid of each system needs to be cooled. The whole car includes multiple cooling systems: the engine is cooled by the radiator; the automatic transmission is cooled by the transmission oil cooler; the turbocharged engine's turbocharger is cooled by the intercooler; the air conditioning system is cooled by the radiator, etc. The cooling components contained in different configurations of vehicles are different, such as non-turbocharged engines do not have intercoolers. These cooling components are usually installed at the front of the racing car and accelerated by electronic fans to cool. All cooling components and electronic fans constitute an assembly, called the radiator assembly in this article. During the driving process of the racing car or when the cooling fan starts to work, air flows rapidly around the racing car radiator assembly to enhance the cooling of the cooling fluid.
The isolation rate requirement of the racing car radiator assembly
Isolation refers to the vibration transmission relationship between objects, reducing the amount of vibration transmitted between each other. There are generally two types of isolation: the first type is the isolation force, which uses elastic support to isolate the force from the vibration source to the foundation. The second type is the isolation amplitude, which reduces the vibration amplitude transmitted from the foundation to the equipment through elastic support. The vibration generated by the rotation of the electronic fan is connected to the car body mounting point through an elastic element, thus reducing the vibration transmitted to the car body and achieving the purpose of shock absorption and noise reduction, which is the first type of isolation force.
The vibration transmission rate requirement of the racing car radiator assembly pad
The racing car radiator is connected to the body through a soft pad, and the radiator soft pad and the body side stiffness and radiator connection bracket stiffness together form a simplified vibration transmission system with the radiator active end bracket, radiator soft pad, and body passive end. Controlling the ratio of the dynamic stiffness of the radiator soft pad mounting point and the lateral stiffness of the radiator to the soft pad stiffness according to the radiator excitation, VTF from the radiator mounting point to the car, and other factors can be comprehensively considered.
The racing car radiator assembly is installed at the front end of the racing car and is fixed on the body by four soft pads. Due to the cooling requirements, electric car radiators are generally double fans, while gasoline car fans are generally single fans. During the rotation of the electronic fan, the vibration generated by the imbalanced force is transmitted to the car body through the racing car radiator assembly pad, causing vibration noise and discomfort.