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The Conclusion Of Modal Analysis Of A Moving Crusher
Dec 13, 2017

Research shows that the mobile crusher frame generally only a few low order frequency calculation, because the influence of higher modes on the dynamic characteristics of the structure is very small, so, in the above analysis based on the design and optimization of the frame, the main consideration:

(1) the lower order frequency of the frame (the value of the first order torsional and bending frequency) should be lower than the engine idle speed to avoid the overall resonance.

(2) the modal frequency of the frame should be as far as possible to avoid the frequency range of the engine's regular work, and the frame vibration mode should be as smooth as possible to avoid the mutation.

(3) the torsional vibration has the greatest influence on the strength of the frame, and it is necessary to improve the torsional stiffness of the frame. The torsional vibration of the frame is mainly affected by its crossbeam, so the stiffness of the frame can be improved by adjusting the position of the beam or changing the cross section shape and size of the cross beam.

(4) the frame of the front arm bending and torsion greatly, by increasing the thickness of arm or change the beam position, make its local mode change.

(5) the torsional vibration has the greatest influence on the strength of the frame, and it is necessary to improve the torsional stiffness of the frame.

Through the structural parameters of the frame of the mobile crusher, the three-dimensional geometric model and finite element model of the frame are established, and modal analysis is carried out. The first 10 natural frequencies and mode shapes of the frame are obtained, which reflect the structural characteristics in an all-round way. Found the frame vibration generated due to the bending and torsion deformation may cause damage to components of fatigue, or even fracture problems such as vibration and using the modal parameters of the frame structure of fault diagnosis and forecast the change and research frame parts or machine. It provides important modal parameters for the corresponding analysis of the rack. It provides a theoretical basis for improving and improving the setting up of the rack, and lays the foundation for further research on vibration, fatigue and noise. It also provides reference and basis for the actual test.


Company Name:Shanghai Dongmeng Road & Bridge Machinery Co., Ltd.

Tel:+0086-021-68911951

Website:http://www.dmcrushing.com/

Mobile:+0086-15921297108

Contact: +0086-021-68911957

E-mail:sales003@dmluqiao.com

Company Add:NO.1188, fengliang Rd, fengcheng Town, Fengxian District, Shanghai, China

Factory Add:NO.1188, fengliang Rd, fengcheng Town, Fengxian District, Shanghai, China