Load Identification Method of Crane based on Vibration Acceleration Signal and Stress Signal

Xiaojie Zhou ； Xiong Hu

《International Core Journal of Engineering》 8卷4期 (2022/04) Pp. 741-747

https://doi.org/10.6919/ICJE.202204_8(4).0088

摘要

Due to the complex structure, huge volume and harsh working environment of the quay crane, the dynamic load acting on the structure cannot be directly measured, and the dynamic load of the structure can only be identified by the response of the structure under the action of the dynamic load. Therefore, in order to obtain the dynamic load status of the quay crane during the working process, a method for identifying the load of the quay crane based on the stress of the front girder pulling rod and the vibration acceleration signal of the hinge point is proposed, and the basic principle and implementation steps of the method are introduced. Taking a 60T quay crane in a large port in China as the research object, the finite element model of the quay crane is established and the transient analysis is carried out, the correlation between the acceleration at the key points and the stress of the pulling rod is calculated, the key variables are selected, and the quay crane is obtained by observing the changing trend of the curve. The corresponding relationship between the average stress of the lower rod and the average vibration acceleration of the hinge point under the action of the dynamic load, the least squares fitting is used to fit the coordinate point data formed by the two, and the function expression between the average stress and the average acceleration is obtained. and verified with actual data. This method provides a new way to indirectly obtain the quay crane load through vibration acceleration.

關鍵字

Quay Crane ； Dynamic Load Identification ； Stress ； Vibration Acceleration

參考文獻

Jerman B, Podrzaj P, Kramar J: An investigation of slewing-crane dynamics during slewing motion-development and verification of a mathematical model (International Journal of Mechanical Sciences), Vol.46(2004) No.5, p.683-685.

F.X. Feng: Fatigue analysis of front girder of quay crane based on ANSYS, Hubei: Wuhan University of Technology. (in chinese).

X.N. Fan, G. Xu, A.H. Wang: Estimation method of fatigue residual life based on the equivalent load spectrum of crane based on artificial neural network(Chinese Journal of Mechanical Engineering), Vol.47 (2011) No.20,p.69-74. (in chinese).

X.M. Wang: ANSYS Numerical Analysis of Engineering Structures:BeiJing, China Communications Press, (2007),p.18-336.(in chinese).

R.B. Yang: Finite method of mechanical structure analysis:Wuhan, Huazhong University of Technology Press, (1989 ),p.56-224.(in chinese).