33results about How to "Increased dynamic load" patented technology

The present invention reduces loads and saves steel on topsides and grillage of a catamaran system by creating a lifting force from a barge to the topsides to offset a sagging bending moment of the self-weight on the topsides during transportation. The present invention can reduce the span of the supports on the topsides on the catamaran float-over barges and move the reaction forces toward inner edges of the float-over barges. The lifting force can cause a reduction of stress on the topsides' and grillage's members caused during the topside offloading and transportation. The stress reduction can result in the members withstanding the additional dynamic load caused by a catamaran system without increasing member sizes adequate for an offloading operation. The reduction results in a significant savings, given the size of a typical topsides for a Spar hull or other offshore structure.

Voltage regulating systems are provided that adjust their output control signals in response to feed-forward information that is indicative of deterministic changes in the load current. A feed-forward circuit provides a feed-forward signal in response to an input signal generated from a source that is external to the voltage regulating system. The voltage regulator systems can proactively respond to the predictive information by adjusting their output, thereby improving the regulation tolerance to dynamic loading. As an example, the feed-forward information can include signals indicating multiple deterministic events that affect the load. Signals from multiple events can be summed together to generate a feed-forward term. As another example, the voltage regulating systems can be responsive to feedback information and feed-forward information from internal to the regulator, in addition to external deterministic information.

The invention discloses a construction method and a cylinder fixing device for pouring concrete to obtain cylinders by the aid of paper forms, and belongs to the technical field of processes and devices for constructing buildings. The construction method and the cylinder fixing device have the advantages that steel forms or wooden forms in the prior art are replaced by the paper forms, the cylinders can be constructed quickly via construction procedures including structure form erecting, main reinforcement binding, paper form mounting, cylinder concrete casting and compacting, form removal and maintenance and the like, and good effects of finished concrete cylinder products can be realized owing to a construction process which is implemented by the aid of the paper forms and is favorable for construction safety, quality and progress control; the perpendicularity of the cylinders can be guaranteed owing to paper form adjusting positioners, and deformability of the cylinders can be reduced owing to the paper form adjusting positioners; plastic films wrap the surfaces of the cylinders after construction is completed and the forms are removed, accordingly, pollution on the surfaces of the cylinders can be reduced, pitted surfaces can be prevented, and the quality and the appearance of the concrete cylinders can be greatly improved.

The invention discloses a method for controlling the cumulative settlement of a pile-supported subgrade strengthening pile. The method comprises the following steps: calculating a dynamic stress attenuating to the upside of a soil arch height by virtue of a Boussinesq's Equation; calculating according to the dynamic stress, a pile spacing and a share ratio of a load of a pile top to obtain the dynamic load above the pile top; calculating according to the weight of a subgrade filling, an upper load of a subgrade and the share ratio of the load of the pile top to obtain a static load above the pile top; calculating according to an ultimate bearing capacity of a pile tip and the static load above the pile top and the dynamic load above the pile top to obtain a cyclic load ratio and a static load ratio of a single pile above the pile top, namely, a thickness of the subgrade and the bearing capacity of the pile tip accord with a requirement in a case that the cyclic load ratio and the static load ratio of the single pile meet a certain condition so that the control for the cumulative settlement of the pile-supported subgrade strengthening pile is completed.

The invention discloses a load shedding design method for an intershaft bearing of an aeroengine, and provides a principle of avoiding a synchronous impact on the intershaft bearing. According to the method, selecting N revolving speed points in an operating range of the aeroengine from a slow speed of a vehicle to a maximal speed, and determining inner ring characteristic frequencies multiplication and outer ring characteristic frequencies multiplication of the intershaft bearing under each revolving speed; marking blade number of a fan; determining whether distances of the blade number of the fans and an integer multiple thereof to the inner ring characteristic frequencies multiplication and to the outer ring characteristic frequencies multiplication are smaller than 2%; and If the revolving speed section that meets the condition is greater than 10% of an engine working revolving speed range, then adjusting the blade number or a rotation speed ratio of a high / low pressure rotor to 90% of the engine working revolving speed range, wherein the distance of the blade number of the fans and an integer multiple thereof to the inner ring characteristic frequencies multiplication and to the outer ring characteristic frequencies multiplication of the intershaft bearing are greater than 2%. The method of the present invention effectively avoids the occurrence of a synchronous impact on the intershaft bearing.

The invention discloses a pallet with built-in steel tubes. The pallet is manufactured from polyethylene, polypropylene, dioctyl sebacate, butyl and ethyl oleate, propylene chloride resin, polyolefin elastomers, borax, calcium carbonate, talcum powder and mica powder proportionally. The method further discloses a method for manufacturing the plastic pallet with the built-in steel tubes. The pallet manufactured by the method is high in load, strength and impact resistance, is corrosion-resistant and has a wide market prospect.

The invention discloses a poly-glyceryl methacrylate grafted hydrophobic charge-induced chromatography medium and a preparation method thereof. The preparation method comprises the following steps: taking hydrophilic porous microspheres as a chromatography medium, activating the chromatography medium by virtue of an activating reaction, carrying out a poly-glyceryl methacrylate polymerization reaction on the surface of the activated chromatography medium, thereby obtaining a polymer grafted chromatography medium; and finally, coupling a hydrophobic charge-induced ligand, thereby obtaining the polymer grafting type hydrophobic charge-induced chromatography medium. The chromatography medium disclosed by the invention has the poly-glyceryl methacrylate grafting chain and hydrophobic charge-induced functional ligand, the ligand density is high, the dynamic loading capacity of target proteins such as antibodies is obviously improved at high flow velocity, the chromatography medium has salt-independent adsorption characteristics, and desorption and recovery can be realized by changing the pH value of the solution to be weakly acidic. The preparation process of the novel medium is simple and convenient, strict oxygen removal in the grafting reaction process is not needed, and the amount of catalysts and ligand is small.