The explosion resistance is one of the main functions of the safe evacuation device, and the explosion resistance of the safety evacuation device is mainly determined by the safe evacuation cabin, and therefore it requires the building structure to have sufficient strength and stiffness to resist the blast wave application to the cabin. In this paper, a new model of the similar triangular cabin structure is established. The explosion resistance impact analysis of the similar triangular cabin structure is carried out by AUTODYNA and ABAQUS software. The similar triangular cabin structure is placed in the simulated residential building, and the pressure cloud in the room during the explosion and the change of the pressure at each time in the single room can be obtained by TNT explosion test simulation. The pressure curve is used to analyze explosion resistance of the safe evacuation device, and the stress and deformation of the new cabin structure can be obtained. At the same time, the stress concentration are located at the corners of the interior of the cabin and the maximum deformation is located on the front and back walls of the pod which can meets the safety evacuation shock resistance.
The soft rock specimens were prepared by using similar materials. The uniaxial creep experiments were carried out on the soft rock specimens under different temperatures and loads. The influence of temperature and load on the creep of similar soft rock and the empirical equation were obtained. The results show that the stressstrain curve is basically linear at normal temperature. As the temperature increases, the stress-strain curve continually shifts upward. As the temperature increases and the creep time increases, the average creep modulus of similar materials in soft rock decreases. As the axial pressure increases, the creep strain deformation increases continuously, and the larger the axial pressure, the more significant the creep strain changes. Through the analysis of the creep curve law, the empirical equations of three types of creep curves are given.
The lever type multifunctional plane strain model test equipment is mainly composed of the basic frame, loading system, data acquisition and measurement system, and auxiliary device. Its biggest feature is the “multiple use of one machine”, which means a variety of geomechanical tests can be carried out with one equipment. The load is carried out by the principle of double lever amplification. The load can be altered by changing the counterweight at the end of the rod. Since the counterweight is determined, the load is constant. Equipped with an automatic device integrating mining, chip removal, support and monitoring, it can realize quantitative mining, timely chip removal, temporary support, real-time monitoring, improve automation and intelligence of model test, which is closer to the simulated engineering practice. The equipment has excellent mechanical properties and can meet the needs of different geotechnical engineering research.
The selection of simulation materials of aquiclude has an important influence on the results of the model test, and has a high requirement in terms of mechanics and hydrologic properties. According to the high quality of river sand as aggregate, cement and gypsum mixed aqueous solution as cementing material, organic silicon mixture similar material as additive, in accordance with the principle of orthogonal test design, sand-binder ratio, cement plaster - and concentration of organic silicon as factors, each factor is equipped with four levels, specimen preparation into under the different ratio of similar model, carries on the uniaxial compressive strength test, splitting test, penetration test and the moisture content test under the different ratio of compressive strength, tensile strength, permeability coefficient and softening coefficient, By means of the range analysis method of orthogonal experiment, the influence degree of each factor level on the similar material is summarized, and it is concluded that the ratio of sand gum to mechanical properties has great influence, and the concentration of organosilicone water has obvious influence on the water rational energy.The new solid-flow coupling simulation material developed in this paper can provide a new scheme for the model test of water-involved problems such as mining under confined water, water-retaining mining and construction in water-rich area, and has high application value.
The seismic resistance of the safety evacuation device is mainly dependent on the structural design of the cabin, and it requires that the bulk structure must have sufficient strength and stiffness to resist the impact of the seismic load applied to the cabin. In this paper, the structure model of the similar triangular cabin structure is established, and then the seismic analysis of the structure of the similar triangular structure is carried out. The first twelve modes and the natural frequencies of the similar triangular structure are obtained by modal analysis in ANSYS Workbench, and the cabin structure deformation position and the most serious dangerous frequency are obtained to avoid resonance. Finally, the seismic acceleration load is applied to the triangular cabin, and the transient dynamic analysis is carried out to simulate a certain earthquake condition. The equivalent stress cloud image and the total deformation cloud analysis show that the acceleration, deformation and stress of the cabin structure are not large, and indicating that the triangular cabin structure satisfies the seismic requirements.
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