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Coriolis mass flowmeter (CMF) is widely used in the industrial field. In mass flow measurement, there are many impurities in measured fluids that will adhere to the inner wall of the vibrating tube of CMF. The vibration characteristics of CMF would change due to the structural change, i.e., wall clung state, which will generate the wall clung state fault. In this paper, aiming at the wall clung state fault of CMF, the finite element model of CMF is established based on ANSYS. The velocity distribution of fluid in the vibrating tube of CMF is analyzed, considering the fluid–structure interaction. The location of the wall clung state in a vibrating tube is determined. Then, the fault model is established. The mechanism of the vibration transmission characteristics outwards of CMF caused by the wall clung state is analyzed by harmonic response analysis. Finally, the failure mode of CMF is investigated.

In this paper, in order to obtain a larger amplitude–frequency width, a T-shaped vibration energy harvester device with 1:2 internal resonance buckling was investigated and designed in a parametric study way, whose natural frequency can be adjusted by changing the geometric parameters and buckling load exerted on the T-shaped piezoelectric beam. The effects of different model lengths and widths on the output voltage of the energy harvester were studied systematically. By comparing the difference between the variation trend of displacement value and output voltage value of harvester model, it can be concluded that internal resonance can broaden the frequency band of vibration energy collection of buckling T-shaped piezoelectric beam. Additionally, when the internal resonance ratio is 1:2, the amplitude width and voltage output value can be effectively increased. The results show that when the buckling T-shaped piezoelectric beam resonates at a ratio of 1:2, the vibration energy collection frequency band of the buckling T-shaped piezoelectric beam can also be broadened.

In tunnel engineering, the forms of lining structure usually are similar. In order to conveniently and quickly evaluate and analyze the tunnel lining structure safety, based on the general finite element software ANSYS, a parameterized model for tunnel lining structure safety analysis with APDL and UIDL was researched in this paper. The results show as follows: The developed parameterized model using the numerical method of limit analysis of strata structure may not only conveniently and quickly evaluate and analyze the tunnel lining structure safety, but also analyze and calculate the safety factor of tunnel lining structure taking into account the effect of tunnel excavation process. The applicability and simplicity of the developed parameterized model in the paper also support its usefulness.

In order to economically and quickly design the tunnel lining structure based on the general finite element software ANSYS, a design optimization module of the tunnel lining structure with APDL and UIDL was studied in this paper. The results show as follows: the TUNNEL_ANALYSIS module developed in the paper can conveniently calculate internal forces and safety factors of tunnel lining structure, which may quickly evaluate and analyze the tunnel lining structure safety; the design optimization module developed in the paper may obtained the results of optimization conveniently for the tunnel lining structure. The applicability and simplicity of the design optimization module developed in the paper also support its usefulness. The case validation shows that the module may satisfy the requirements of engineering and study.

In this paper, we exploit the contact unit (TARGE170 and CONTA174) in ANSYS analysis software to simulate the secondary lining structure and waterproof material of tunnels. Then the longitudinal deformations of the secondary lining structure in air temperature field for cold-region are computed based on instances under different temperatures respectively. Finally, we compare the computation with the data field observed and analyze the results.