The supersonic parachute plays an important role in the descent and landing of Mars missions. Next-generation parachutes, such as disksail are alternatives to disk-gap-band (DGB) parachutes. Disksail parachutes have larger porous gaps smaller seams on canopy surface than DGB To date, influence mechanism or their locations performance systems Martian atmospheric conditions remains unclear. In this study, different models with based NASA’s were designed, aerodynamic characteristics geometric...

Abstract The centre of the vortex within drip irrigation emitter easily forms a low‐speed or zero‐velocity zone, which causes sediment deposition and blocks narrow channel emitter. To solve this problem, funnel‐shaped was designed optimized. Numerical simulations field tests were conducted to compare analyse flow index, energy dissipation coefficient relative ratio results showed: (1) When incident angle ( θ ) diversion increased from 0 37.4°, 20% 64%. main way in changed impingement water...

The 3-D FEM numerical model of foundation for wind power turbine generator system is created, based on the platform ANSYS. non-linear contact between stub part and concrete introduced. internal mechanical characteristics laws are studied when tower structure bearing random direction load. settlement deformation discussed status areas attained. analysis which considers material nonlinearity more rational. research results provide indigenous design optimization our nation scientific basis.

The pressuremeter test is a horizontal in-situ load that can objectively reflect the lateral strength and deformation characteristics of tested soil. existing methods for determining characteristic values foundation bearing capacity through tests are mainly based on pressure corresponding to starting ending points straight line part curve, which has significant uncertainty. Based p-s this article uses cubic polynomial fit goodness greater than 0.99; gives method value at inflection point...

Accurately measuring emotion is a major challenge in advancing the understanding of human and developing emotional artificial intelligence. In many existing studies, participants' ratings interval scales are considered true reflection their experiences. However, recent research suggests that ordinal annotations emotions can more accurately capture expression process, providing potential method for precise measurement. our characteristics validity this new form representation still relatively...

Based on the ANSYS program, a numerical model of spiral case structure hydropower station is built. The nonlinear contact characteristics are introduced in this model. For working conditions under different internal water pressure, structural simulation analysis conducted. effect pressure structure, and mechanical stress reinforcement analyzed. evolution process concrete cracks, from microscopic period to macroscopic exhibited. reasonable scheme optimization attained.

The transient temperature field and thermal creep surrounding concrete are analyzed with a three-dimensional FEM model that simulates the construction process of spiral case, based on program development ABAQUS. effect hydration cooling pipes is studied. comparison difference in schemes performed, then reasonable scheme has been defined. distribution stress given. It concluded control measures effective to crack prevention.

Basing on the theory of power flow, frequency response analysis was acted in a hydropower house under dominant with measured data Three Gorges Station spiral case and draft tube. Power flow walls calculated by APDL procedure properties were analyzed. The conclusion is that longitudinal wave main method powerhouse, energy reflected stacked at top walls. Displacement along river changes decays obviously. Intensity vibration origin distance between wall are both influencing factors，increasing...

By using ANSYS software, the finite element model of foundation for wind turbine generator system is built. On basis concrete elastoplastic constitutive, non-linear contact between stub, a steel part, and introduced, internal mechanical characteristics law which under influence with unfixed direction are researched on. The interaction state attained. numerical analysis considering status material nonlinearity more reasonable research results offer scientific domestic autonomous designing optimizing.

The transient temperature field and creep of concrete surrounding a spiral case are analyzed with three-dimensional method, based on ABAQUS. mechanism hydration heat cooling pipes is studied. distribution construction given. effect gap between steel liner researched. It concluded that the influence measure parameters indispensable.

The parts with axial special-hole, which are difficult to be processed by traditional machining process because of the high cost and low efficiency, widely used in many fields. In this paper, a new practicable method form special-hole open-die cold extrusion is put forward. four failure types forming irregular-holes analyzed. key parameters, cone angle, reduction, original ratio thickness-diameter, etc., largely influence limits range analyzed numerical simulation , make an experiment verify...

A numerical model for spiral case of hydropower station is built. The contact considered and the sensitivity analysis different reinforcement ratio analyzed. impact ratios on structure studied. stress mechanical characteristics steel bar status taken. rational range, process evolution regularity concrete cracks from microcosmic aspect to macroscopic are obtained.

Based on the plastic damage model for concrete, this paper realizes simulated construction preloading filling spiral case (PSC) in a hydraulic plant. The contact property and state are analyzed with nonlinear FEM. distribution of stress given. development mechanism initial gap is studied. effect asymmetry displacement researched. It concluded that influence remarkable.

The three-dimensional finite element numerical model of wind power generator unit is created by using ANSYS. elastic-plastic constitutive introduced and the nonlinear contact set up between foundation stub concrete. different reinforcement arrangement’s impact on structure researched, strength characteristic law concrete discussed a more rational scheme raised. It’s to consider status material nonlinearity. research results offer scientific basis for design optimization foundations turbines.

The vibration of sluice gate may lead to the damage hydraulic structure, based on S-transform, frequency and phase distribution pulsating water pressure. results show that as level increases, pressure is small, power acting bottom decreasing, components are rich, wide, although amplitude whole pulsation not changed; there an obvious wave about time changes, map symmetry periodically velocity increase increases.