In response to the problem of weld cracks on hanger frame of the suspension roller coaster,the failure mechanism of weld cracks on hanger frame was analyzed through dynamic stress test,fatigue life calculation,impact acceleration test and other means.It was found that the hanger frame was subjected to a normal stress of 81.91％higher than the design value due to the+Z direction impact acceleration of 74.05％higher than the design value.The weld cracks on hanger frame has developed fatigue cracks under alternating loads with a large amplitude of normal stress.Based on this,structural improvements were made and fatigue life calculations were conducted to prove that the normal stress of the hanger after the structural improvement was reduced by 41.20％compared to before,and the predicted fatigue life was 20 years and 6 months.The above indicates that the failure analysis and structural improvement measures have played a good role.
NETL
NSTL
万方数据
