Abstract: The inaccurate selection of the suspension position of the exhaust system can easily lead to abnormal noise and vibration during the driving of the car,and it is extremely important to accurately select the position of the suspension point of the exhaust system. The position value extracted from the vibration mode of the exhaust system is weighted and processed by the Root Mean Square (RMS) method to obtain the root mean square value method suspension point layout of the vibration mode displacement. The position of the suspension points arranged by the Average Driving Degree Of Freedom Displacement (ADDOFD) method and the suspension points obtained by the root mean square method are compared and verified. The results show that the root mean square method of suspension point arrangement is effective in SUV. The root mean square method has a higher distribution efficiency than the average driving degree of freedom displacement method.Shortened design cycles.

Key words: vibration and waves, exhaust system, Root Mean Square (RMS) method, hook position, Average Drive Degrees Of Freedom Displacement (ADDOFD) method