Analysis of exhaust system's broken bolt based on simulation and test
Aiming at the problem of bolt breakage in exhaust system of a tractor,a solution was proposed by combining test and CAE simulation.Through modal and vibration tests,it was confirmed that the bolt breakage fault was caused by the natural frequency of the exhaust system and the excitation frequency of the common engine speed.The results of CAE simulation show that the natural frequency of the exhaust system could be significantly improved by improving the mass distribution of the exhaust system,the position of the bellows and the support structure,and the excitation frequency of the common engine speed could be avoid.The test showed that the scheme improved the reliability of the exhaust system and was feasible.
diesel engineexhaust systembroken boltnoise,vibration and harshnessCAE
NETL
NSTL
万方数据
