In this paper, we describe the nonlinear outcome of spiral shocks in protoplan-etary disks. Spiral shocks, for most protoplanetary disk conditions, create a loss of vertical force balance in the post-shock region and result in rapid expansion of the gas perpendicular to the disk midplane. This expansion has characteristics similar to hydraulic-jumps, which occur in incompressible fluids. We pre...

Truck mounted concrete pump boom is typical flexible structure. Due to the increasing of boom length, the flexible characteristics play important role in the dynamics behavior. Three simulation models are built. The first is rigid model. The second is flexile model with four booms flexible used modal reduction technique. The last is added with boom hydraulic cylinder equivalent virtual spring d...

The clarification on the collapse mechanism of a caisson breakwater has been an urgent task in order to reduce damages caused by next millennium tsunamis. In this study, piping destruction of a mound induced by seepage flow is taken into consideration solely. A stabilized ISPH method proposed by Asai (2012) is adopted with some modification associated with the extended Darcy law (Akbari 2013, 2...

In this paper, we describe the nonlinear outcome of spiral shocks in protoplan-etary disks. Spiral shocks, for most protoplanetary disk conditions, create a loss of vertical force balance in the post-shock region and result in rapid expansion of the gas perpendicular to the disk midplane. This expansion has characteristics similar to hydraulic jumps, which occur in incompressible fluids. We pre...

A commercial electromechanical actuator (EMA) is to be dynamically tested with predetermined stroke and load profiles for transient thermal and electric power behavior to validate a numerical model used for aerospace applications. The EMA will follow the stroke profile representative of a real aircraft mission duty cycle. A hydraulic press will exert a corresponding load profile onto the EMA. S...

[1] Wetland ecosystems are often characterized by distinct vegetation patterns. Various mechanisms have been proposed to explain the formation of these patterns; including spatially variable peat accumulation and water ponding. Recently, short‐range facilitation and long‐range competition for resources (a.k.a scale dependent feedback) has been proposed as a possible mechanism for pattern format...

In order to study the tribological properties of different hydraulic oils under motion modes, four-ball tester and block-on-ring were used optimize test parameters evaluate performance commercial oils. The results showed that optimized methods form point line modes can better extreme pressure anti-wear oi. There was a negatively correlation between performance; this method provide basis for rea...

Attempts to understand mechanisms underlying plant mortality during drought have led to the emergence of a hydraulic framework describing distinct hydraulic strategies among coexisting species. This framework distinguishes species that rapidly decrease stomatal conductance (gs), thereby maintaining high water potential (Px; isohydric), from those species that maintain relatively high gs at low ...