In this paper, taking AM-50 Road Heaer as an example, the metheds of structural dynamic modification optimization for road headers are studied using experimental modal analysis and physical parameters analysis. The ma...In this paper, taking AM-50 Road Heaer as an example, the metheds of structural dynamic modification optimization for road headers are studied using experimental modal analysis and physical parameters analysis. The machine’s modal model and lumped mass model are established and the vibration response simulation is calculated for the two models with the load spectral measured. On the above basis, the dynamic parameters of the models are optimised and some useful results have been obtained.The research methods in this paper can be used for the reference to the other lager type mining machines.展开更多
An experimental program was undertaken to test the feasibility to detect the occurrence of structural damage using a modified mode shape difference technique. The vibration response of a steel beam fixed at one end an...An experimental program was undertaken to test the feasibility to detect the occurrence of structural damage using a modified mode shape difference technique. The vibration response of a steel beam fixed at one end and hinged at the other was obtained for the intact and damage conditions. Modal analysis was performed to extract the frequencies and mode shapes. The method shows a good potential in detection of occurrence and location of damage.展开更多
文摘In this paper, taking AM-50 Road Heaer as an example, the metheds of structural dynamic modification optimization for road headers are studied using experimental modal analysis and physical parameters analysis. The machine’s modal model and lumped mass model are established and the vibration response simulation is calculated for the two models with the load spectral measured. On the above basis, the dynamic parameters of the models are optimised and some useful results have been obtained.The research methods in this paper can be used for the reference to the other lager type mining machines.
文摘An experimental program was undertaken to test the feasibility to detect the occurrence of structural damage using a modified mode shape difference technique. The vibration response of a steel beam fixed at one end and hinged at the other was obtained for the intact and damage conditions. Modal analysis was performed to extract the frequencies and mode shapes. The method shows a good potential in detection of occurrence and location of damage.
