143 results about "Wind damage" patented technology

The invention provides an urban multi-disaster risk loss evaluation system based on an open source system framework and a building spatial database. The urban multi-disaster risk loss evaluation system comprises an 1a) MAEviz open source framework development platform based on an Eclipse RCP frame, wherein the MAEviz open source framework development platform is used for extending a flood, wind damage and tsunami disaster loss evaluation module so as to realize multi-disaster urban risk loss evaluation; a 1b) disaster information module which is used for analysis of the risk and the dangerousness of flood, typhoon, earthquake and other natural disasters and evaluation of regional disaster-causing possibility; a 1c) spatial geographic information module which provides a common GIS function so as to realize construction of a localized urban disaster-affected body geographic information system property database; an 1d) urban disaster-affected body type classification and vulnerability analysis module which is used for establishing a building vulnerability module base of typical building structures under different disasters; and a 1e) disaster loss evaluation module which is used for damage prediction of disaster-affected body structures and damage loss evaluation of the disaster-affected bodies.

The invention discloses a wind vibration simulation method of a 220kV power transmission line tower line coupled system. The wind vibration simulation method comprises the following steps: 1: establishing a finite element model of the power transmission line tower line coupled system; 2: carrying out formfinding on the power transmission line tower line coupled system; 3: carrying out wind load calculation on the power transmission line tower line coupled system; 4: carrying out damping calculation on the power transmission line tower line coupled system; and 5: carrying out wind vibration response calculation and data extraction analysis. The wind vibration simulation method establishes a fine and accurate finite element model of the power transmission line tower line coupled system, and considers the influence of structural damping during wind vibration simulation calculation. The wind vibration simulation method is suitable for carrying out wind vibration analysis on a power transmission line of an area where wind damage frequently happens. On the basis, the power transmission line is subjected to local reinforcement and wind damage early warning to minimize the disaster loss.

A combination window frame and panel or shutter door system to provide security to premises and to protect the windows from storm wind damage. The frame and shutter door combination is configured to be installed over existing pre-installed windows or configured to be combined as a single window shutter door frame combination to install in window openings on a wall. In an alternative design, the window has a frame adapted to receive a storm panel that covers the window during storms.

A device and method for applying a wind force to a plurality of plants in an agricultural environment is provided to screen for selected wind-resistance traits in the plurality of plants. In one embodiment of the present invention, a device is provided including a generating device for creating a moving fluid stream to provide the wind force, a directing device, such as a duct and/or movable vane, for precisely and selectively directing the wind force towards a portion of at least one plant, and a controller for adjusting one or more parameters of the fluid stream. The device and/or method embodiments of the present invention may thus be used to selectively apply the wind force to one or more plants (or portions thereof) such that the plants may be evaluated with respect to one or more wind-resistant physical characteristics.

The invention relates to a vertical shaft wind turbine with lifting power and resistance complementary adjustment, which comprises a lifting power type vane, a resistance type vane, a support, a rotary shaft and a resistance type vane adjusting mechanism, wherein the adjusting mechanism is used for adjusting the position of the resistance type vane in the radical direction of the rotary shaft of the wind turbine or the windward side angle of the resistance type vane. By adjusting the position and the angle of the resistance type vane in the integral structure of the wind turbine, the optimal adjustment for the tip speed ratio Lambada of the vertical shaft wind turbine is simply and easily realized, the rated wind speed of the wind turbine can be designed or adjusted according to the actual wind speed and density of a wind field so that the wind turbine reaches the optimal wind energy collecting efficiency under a rated wind speed, the problem of low wind speed start of the wind turbine is solved, simultaneously the upper limit of wind energy and wind speed connection of the lifting power type vane is also improved, and the wind speed range of the wind turbine is further expanded so that the utilization rate of the wind energy is further improved; and besides, the damages and influences of super-high wind speeds (wind damages) to the wind turbine are also effectively reduced.

An outdoor umbrella stabilizer system for preventing wind damage to an outdoor umbrella having a plurality of cords, a plurality of clips and a means of securing the cords to a weighted object. The stabilizer system flexibly maintains the canopy in position, preventing strong winds from catching the canopy and twisting, warping, contorting, buckling or deforming the umbrella, thereby stabilizing the outdoor umbrella. The stabilizer system installs on many styles of outdoor umbrellas, including a cantilever, a beach umbrella, a deck or patio umbrella, a center pole or vertical pole of the umbrella unnecessary for installation. The stabilizer system has a sac containing ballast as a weighted object. The cords attach to the sac. For an umbrella accommodated by a table having a center hold for the umbrella, the table is the weighted object, the cords attaching to the legs.

The invention discloses an indoor industrial culture method for portunus trituberculatus, comprising the following steps of: building a culture bond, preparing culture baskets, shelving the culture baskets, stocking crab seedlings, managing culture and directionally mating. A horizontal shelf is arranged in the culture bond, a long-edge basket of the culture baskets is equipped with a slot in which a separation plate is inserted, a hiding room containing silt is arranged in the culture baskets on the left side and the right side of the separation plate, and male and female crab seedlings are independently cultured in the culture baskets on the left side and the right side of the separation plate; after growth shelling and reproduction shelling, the separation plate is taken off so that one male portunus trituberculatus and one female portunus trituberculatus naturally mate in the culture baskets, and after mating, the male portunus trituberculatus is moved out of the culture basket atonce. The indoor industrial culture method for the portunus trituberculatus has the advantages of easy control on water quality, high survival rate and good culture benefit, and can prevent the portunus trituberculatus from killing each other, and the portunus trituberculatus is not injured by wind damages and wave damages.

A novel sheet holder either with or without a board. The sheet holder comprises a base angle plate and a holding angle plate, connected by extension springs for toggling said holding angle plate between a closed position for holding said sheet and an open position for removing said sheet. Two pegs and a rubber block with groove are installed for increasing the number of held sheets and more securely holding the mounted sheets. The present sheet holding board can be rotatably mounted to the back of a picture frame with locking feature. The sheet holder without board can be applied for holding advertisement sheet for indoor and outdoor display. Novel art hanging and control system will raise and lock the art for display, and lower it to a reachable level for display change. This art may include an art sheet, 3D art, or a computer monitor showing advertisement message. For outdoor display, a clear vinyl cover can be employed for holding an art sheet and protect it from UV radiation, rain and wind damage. A spring or weight load can be employed to maintain the art to be displayed in its uppermost position and leveled. Such spring and weight load can also be used in a flagpole for such benefit.

The invention relates to a windproof mechanism of an advertising board, in particular to an automatic torque return wind load avoiding mechanism. The automatic torque return wind load avoiding mechanism is composed of a main column, a steel ball, an auxiliary column, face boards, a steel structure framework, a torsion spring, a rotating shaft and a step. Three rectangular face boards are connected end to end to form a triangular prism, the vertically-arranged auxiliary column is located in the triangular prism, the lower end of the auxiliary column is the whole rotating shaft integrated with the auxiliary column, the lower end of the main column is fixed with the ground, a vertical blind hole is formed in the top face of the main column, and the lower end of the rotating shaft is located in the blind hole. When fierce wind blows the face boards, the mechanism can automatically rotate to enable the smallest windward face to face the wind blowing direction. Therefore, the wind force suffered by the advertising board is reduced to be minimum, and the advertising board is protected against fierce wind damage on the premise that the steel product using amount is not increased.

The invention discloses a two-sectional inclined folding blade device for a large wind-driven generator. The two-sectional inclined folding blade device for the large wind-driven generator comprises a wind turbine hub, a two-sectional combined blade and a blade connecting device, wherein the two-sectional combined blade comprises a main blade and a folding blade, the main blade is a fixed blade and the folding blade is a rotating blade; the folding blade is driven to rotate by a drive motor and a rotating gear directly; an included angle is formed between the rotating axis of the folding blade and the upper reference axis of the main blade; the folding blade can perform upward rotating movement and downward rotating movement, and one side of the blade has a warped edge, so that the rotating torque can be adjusted conveniently aiming at different wind conditions; and therefore, an effect of variable pitch is achieved. When strong wind and wind damage is met, the device can enter a completely folded position of safety protection. The device provided by the invention can be manufactured and assembled in sections, has the characteristics of simple structure, convenience in field assembly and maintenance, and easiness and convenience in control of the start and the shutdown of the blades, and is particularly suitable for large and ultra-large blade units.

A series of screw-type anchors are set around the periphery of the structure. The anchors are set below the ground surface and enclosed in recess pots to provide access, helping to keep soil from covering the anchors. When a storm is predicted, a plurality of straps are passed over the roof and hooked into the anchors. The straps have a ratchet at one end to tighten the straps and provide tension to the roof. Gutter guards are optionally provided to protect a gutter from damaged by the straps. Ridge vent guards are also optionally provided to protect a ridge vent from damage by the straps. Recess pot covers are provided to reduce the chances of tripping.

The invention belongs to the technical field of fruit tree pruning, in particular to a method for pruning peach trees. Pruning in the first year: After the seedlings are planted, select full buds to fix the stem, and remove all branches on the main trunk at the same time; in summer, perform bud removal and branch thinning treatment, and remove competing branches, upright branches, over-dense branches, and flat oblique branches in winter. Keep fruiting branches for each peach tree; pruning in the second year: in summer, extend the center trunk and pinch or drop the head, keep the center trunk in winter, remove the branches at the base of the center trunk, and keep only the middle and upper fruiting branches; pruning in the third year: summer When pruning, keep the twigs, and keep the distance between each twig to bear fruit; in winter, remove the prosperous branches on the central trunk from the base, and let them bear fruit after flowering. The invention is scientific and reasonable, simple and easy to implement, and the peach trees are well ventilated and light-transmitting, easy to manage, high in yield and high in quality, high in peach quality, less damaged by wind and rain, less secondary peaches, and high in yield.

A method and device are described for protecting structures having a central longitudinal portion and radially extending arms, including plants such as palm trees from wind damage. The device may be positioned around a structure and includes a flexible material configured to wrap around a central longitudinal portion and radially extending arms, such that a lower edge of the flexible material is positioned near a lower portion of the radially extending arms and when wrapped around the structure, a portion of the radially extending arms is pushed toward the central longitudinal portion of the structure and two side edges of the flexible material are proximate one another. The device fastens around the structure and is configured to secure the radially extending arms against the central longitudinal portion of the structure and to reinforce the central longitudinal portion of the structure thereby protecting the structure against wind damage.

An outdoor sign resistant to wind damage includes a support column; a display having secured and released positions, a lower edge and a central vertical axis aligned with the axis of the column when the sign is in the secured position; a lower horizontal arm with opposed ends mounted on the upper end of the support column; an upper horizontal arm with opposed ends attached to the display, the upper arm being parallel to the display lower edge and the lower support arm when the display is in the secured position; a pivot mechanism joining the support arms adjacent one end; and a retainer mechanism between the opposite ends of the support arms, the mechanism releasibly securing the support arms to each other when the sign is in the secured position. The retainer mechanism is unlatched when the wind force is greater than a predetermined value.

The invention discloses a wind damage preventing advertising frame, aiming to provide a novel technical scheme for advertising frames. When devastating wind blows towards a billboard, the length direction of the billboard is made to tend to the wind direction so as to avoid damage. The wind damage preventing advertising frame comprises an upright post, a sleeve, a compression spring, an upper ball trough, a lower ball trough, steel balls, a billboard, and the like, wherein the annular lower ball trough with a sunken upper side is fixedly connected to the columniform upright post; the steel balls are evenly distributed in the ball troughs; the annular upper ball trough with a downward concave is arranged on the steel balls and is not fixedly connected with the wall of the upright post; the lower edge of the sleeve is fixedly connected with the upper side of the upper ball trough, wherein the inside diameter of the sleeve is slightly larger than the outside diameter of the upright post; the top end of the upright post is provided with a nut; the lower end of the compression spring extends into a lower blocking hole below the lower ball trough arranged on the wall of the upright post, and the upper end extends into an upper blocking hole above the upper ball trough at the lower end of the sleeve, wherein the inside diameter of the compression spring is larger than the outside diameter of the sleeve; the square billboard is fixedly connected with the sleeve; and the billboard is installed in such a way that the vertical center line of the billboard slightly deviates from the axis of the upright post.

The damage from cyclonic winds is reduced by (1) providing another source of air for the center of the cyclonic wind from outside the system, the air desirably being cooler and denser to minimize the tendency of the air to flow upward; (2) by “plugging” the center of the cyclonic wind to prevent the upward flow of air in the center or the downward flow of air around the inside wall of the cyclonic wind, e.g., by countering the upward flow in the center or by countering the downward flow around the inside of the cyclonic wind flow; and/or (3) by slowing the cyclonic wind directly thus diminishing the flow of air and the ability of the cyclonic wind to form a wind wall.

The invention discloses a wind tunnel experiment method and device. According to the method, free wind starts in the experiment model area direction; tracer particles are released, and the tracer particles are made to move in the free wind; the tracer particles in an experiment model area are irradiated; an image of the experiment model area is acquired; the image is analyzed, and a flow velocity is calculated; flow field parameters are acquired according to the flow velocity; and lastly, according to the flow field parameters, wind damage formation conditions of a power transmission line are determined. The method is advantaged in that based on the particle image velocity measurement technology, the mountain ravine landform and heavy wind disaster-caused process is really simulated, three-dimensional flow field measurement precision is improved, the more accurate flow field structure can be acquired, the wind damage conditions under different wind speed wind direction conditions can be better determined, and reliable reference is provided for complex landform flow field measurement model making and the turbulent boundary layer value simulation technology.

The invention discloses a wind speed monitoring speed of pole towers of a power transmission line. The wind speed monitoring speed comprises the following steps: selecting a plurality of target monitoring points in a to-be-monitored area according to a wind speed affecting factor; sending an acquisition instruction to weather monitoring devices mounted on pole towers of the target monitoring points; obtaining a target wind speed monitored value acquired by each weather monitoring device, wherein each target wind speed monitored value comprises the serial number of the corresponding weather monitoring device and target wind speed data; calculating conversion wind speed data corresponding to predetermined pole tower height according to the target wind speed monitored value by utilizing a height conversion formula; carrying out interpolating calculation on the conversion air speed data by utilizing a universal Kriging interpolating calculation method and a network analyzing method to obtain wind speed monitored values corresponding to the predetermined pole tower height of all the pole towers within the to-be-monitored area. Compared with wind speed estimation, the method can obtain wind speed monitored values of all the pole towers more accurately, so that necessary reference data is provided for line risk assessment and wind damage loss analysis.

The invention discloses a tree wind load measurement method. The measurement method comprises the steps of measuring a bending moment, a torque and wind force generated by a tree trunk under the action of a wind pressure, and an acting point position of the wind force. A wind load is obtained by the steps of mounting deformation sensors at different positions and azimuthal angles of the tree trunk and performing measurement to obtain a relationship (epsilon max=f(v2)) among a maximum linear strain, a maximum shear strain and a wind speed generated by the tree trunk under the action of strong wind; then under the no-wind condition, performing a manual tension test on a tree, and establishing a relationship (M=g(epsilon max)) among the bending moment, the maximum linear strain and the shear strain; and finally according to the two formulae, establishing a relationship (M=g(epsilon max)) between the bending moment and the wind speed, wherein the relationship is called as a wind-induced bending moment characteristic equation. For the selected tree, the wind-induced bending moment characteristic equation of the tree has specificity and conditional uniqueness. Based on this, a wind load on a tree crown and an acting point position also can continue to be determined. The method solves the difficult problem of difficulty in determining the wind load of the tree, and can be used for monitoring/predicting wind damage resistance of trees in forest regions, urban street trees and ancient and rare trees in gardens.

A system and method for resisting catastrophic wind damage to a structure is provided. At least a pair of anchoring devices are fixed to a foundation of the structure at opposite positions adjacent to sidewalls of the structure. A first cable and a second cable are attached to the anchoring devices, respectively. A tensioning member is provided under a roof of the structure and between the sidewalls of the structure. The tensioning member, such as a turnbuckle, is further attached to both the first and second cables for applying a tension force to the cables. Cable guides can be further provided to route the cables along the roof and sidewalls of the structure.