28results about How to "Reduce stress levels" patented technology

The invention relates to a heat treatment method for additive manufacturing of a nickel-based superalloy, and relates to the technical field of additive manufacturing. The heat treatment method comprises the following steps that the additive manufacturing nickel-based superalloy is placed at the first temperature, and first-step stress relief annealing treatment is carried out; and then the temperature is increased to a second temperature for second-step stress relief annealing treatment, and after cooling, the additive manufacturing nickel-based high-temperature alloy subjected to stress relief annealing treatment is obtained. The first temperature is 850-890 DEG C, and the second temperature is 900-950 DEG C; carrying out solution treatment on the additive manufacturing nickel-based superalloy subjected to the stress relief annealing treatment to obtain the additive manufacturing nickel-based superalloy subjected to the solution treatment; and aging treatment is conducted on the additive manufacturing nickel-based superalloy obtained after solution treatment, and the additive manufacturing nickel-based superalloy obtained after heat treatment is obtained. The method is mainly used for improving the volume fraction of the gamma'phase of the additive manufacturing nickel-based superalloy, obtaining the gamma 'phase with high cubic degree and proper size, and eliminating cracking and recrystallization caused by residual stress.

The bearing ring heat treatment process based on residual stress optimization comprises the following steps that S1, the surface of a bearing ring is cleaned, and it is ensured that the surface of the bearing ring is clean and free of oil stains and impurities; s2, sectional type heating treatment is conducted on the bearing ring, and the bearing ring is heated to the preset heat treatment temperature; s3, the bearing ring subjected to heat treatment is rapidly put into a quenching medium to be rapidly cooled; s4, the quenched bearing ring is subjected to tempering treatment; s5, the bearing ring subjected to tempering treatment is subjected to cooling treatment.The bearing ring heat treatment process can adjust stress distribution in the bearing ring, the cracking risk caused by stress concentration is reduced, generation of residual stress is reduced, release of the residual stress is promoted, the uniformity of residual stress distribution is improved, and the service life of the bearing ring is prolonged. And the residual stress can be effectively reduced, the toughness is improved, the structure is refined and the stability is improved, so that the quality and the service life of the bearing are improved.

The invention relates to the technical field of feed additives, in particular to a feed additive and application thereof. The additive disclosed by the invention contains three components: gamma-aminobutyric acid, organic selenium and magnesium oxide. Wherein the gamma-aminobutyric acid specificity reduces the overall stress level of the pork pigs, so that more energy is used for body nutrient substance deposition, immune function and the like. Magnesium oxide specifically regulates and controls acid-base balance of gastrointestinal tracts, reduces the muscle stress level, relieves muscle tension, and plays an important role in gastrointestinal tract health and water holding capacity of pork pigs. Selenium is an important element for myoprotein to regulate and control oxidation resistance, and organic selenium plays a key role in color and luster of meat. The three components synergistically and specifically regulate drip loss increase and pale color caused by stress, meanwhile, the growth performance is improved, and death and culling caused by stress are reduced.

The present invention relates to a high-strength fiber composite metal damper, comprising: a shear plate; a pair of connecting plates arranged in parallel and opposite to each other, fixed vertically to the upper and lower opposite ends of the shear plate, the connecting plates being connected to a building structure; a stiffening structure, fixed vertically to one side of the shear plate to form a fixing seam, the two ends of the stiffening structure being fixedly connected to the connecting plate; a carbon fiber strip, the width of which is greater than the width of the fixing seam, the carbon fiber strip being attached and fixed to the other side opposite to the shear plate and corresponding to the fixing seam. The carbon fiber strip and the fixing seam are respectively located on the opposite sides of the shear plate, which is convenient for attaching and replacing the carbon fiber strip. By sticking the carbon fiber strip, part of the stress on the shear plate can be decomposed onto the carbon fiber strip, which can reduce the stress level on the shear plate, thereby improving the ductility of the shear plate, thereby solving the problem that the weld between the stiffening structure and the shear plate easily causes the shear plate to become brittle and the ductility to decrease, and the stress concentration near the stiffening structure affects the effect of the metal damper.

The invention discloses an opposite-pull assembly for a UHPC bent cap formwork, the UHPC bent cap formwork and a combined bent cap. The opposite-pull assembly comprises an opposite-pull rod and a pair of opposite-pull rod fixing pieces arranged on the tops of a pair of formwork webs correspondingly. The opposite-pull rod fixing piece comprises a pre-buried fixing plate fixedly arranged on the inner surface of a formwork web and a clamping plate fixedly arranged on the outer surface of the formwork web, and through holes allowing the opposite-pull rods to penetrate through are formed in the areas, exceeding the top of the formwork web, of the pre-buried fixing plate and the clamping plate. And the end parts of the opposite pull rods penetrate through the through holes in the pre-embedded fixing plate and the clamping plate, and are fixed through an inner fastener positioned on the inner surface of the pre-embedded fixing plate and an outer fastener positioned on the outer surface of the clamping plate. The opposite-pull rod is arranged above the top of the formwork web, the opposite-pull rod can be dismantled and reused, and the economic performance is good. And meanwhile, holes are not required to be formed in the formwork webs for mounting the opposite-pull rods, so that the structural integrity of the formwork webs is better, and the appearance is more attractive.

The utility model provides a flange used for a bell jar standing cavity and the bell jar standing cavity, and the flange used for the bell jar standing cavity comprises an annular flange main body and an external connection part used for being connected with an external base, the external connecting part is arranged on the outer side wall of the flange main body; an annular butt joint groove used for being in butt joint with a bell jar standing cavity is formed in the upper end of the inner side wall of the flange body, and the bottom wall of the annular butt joint groove is connected with the inner side wall of the flange body through a first inclined face. The first inclined face is used for being matched with the bottom end face of the bell jar standing cavity to form a first groove used for welding when the bell jar standing cavity is embedded in the annular butt joint groove. According to the utility model, the effective length of the weld joint at the joint of the flange and the bell jar standing cavity is increased, so that the stress level of the weld joint in unit length is effectively reduced, the connection stability between the flange and the bell jar standing cavity is enhanced, and the overall rigidity of a final product is improved.

The present application relates to a kind of combination bridge deck structure and its construction method, it includes: bridge deck slab;Multiple stiffening ribs, multiple the stiffening ribs are spaced apart along the bridge direction, and are all fixed in the bottom of the bridge deck slab along the longitudinal direction;At least one transverse diaphragm, the transverse diaphragm is vertically fixed in the bottom of the bridge deck slab;Ultra-high performance concrete layer, the ultra-high performance concrete layer is arranged on the top of the bridge deck slab, and multiple cavities are formed between the bridge deck slab, each the cavity is along longitudinal direction extends, and is spaced apart at the transverse diaphragm, and the cross section of each the cavity is arch-shaped.The present application is based on arch effect by the cavity formed between ultra-high performance concrete layer and bridge deck slab to transfer upper wheel load to the stiffening rib below bridge deck slab dispersion, reduce the stress of bridge deck slab, improve the stress distribution of bridge deck slab.Further, the present application uses connecting assembly instead of shear nail, and lays finished steel mesh on connecting assembly, simplifies field construction process.

The invention discloses a conductive material and a preparation method and related application thereof, and relates to the field of materials, raw materials of the conductive material comprise SAMs molecules and EDOT molecules, the high-performance conductive material is obtained after the SAMs molecules and the EDOT molecules are mixed, compared with PSS, the use amount of SAMs in the conductive material is extremely low, acidity can be greatly reduced, and the stability of a device can be improved; and secondly, the energy band structure can be adjusted by adjusting the types and the adding proportion of the SAMs, and proper hole transport layers can be designed for different devices, so that the efficiency of the hole transport material as a carrier transport material is improved, and the application range is expanded. In addition, SAMs serves as a catalyst and a stabilizer in the reaction process, synthesis can be conducted through a one-pot method, the obtained material can be directly used, the complex purification process is avoided, and the method is suitable for large-scale green industrial production and has very high expected industrial value.

The invention relates to a circumferential quasi-isotropic composite material membrane disc and a preparation method thereof.The composite material membrane disc comprises a center through hole and an annular area concentric with the center through hole, and an inner connecting hole reinforcing area concentric with the center through hole is arranged on the inner side of the annular area; an outer connecting hole reinforcing area concentric with the central through hole is arranged on the outer side of the annular area; the composite material membrane disc is obtained through hot press molding of composite material layers, the layer laying mode is # imgabs0 #, the layer laying number of the annular area is N0, the deflection angle of the next layer in every two adjacent layers of composite materials in the same direction is alpha compared with the deflection angle of the previous layer in the same direction, the laying frequency of each layer of composite materials is beta, only half of the # imgabs1 # symmetrical layer is written, and only half of the # imgabs1 # symmetrical layer is written. And the parentheses and subscripts s represent symmetry. Compared with the prior art, the method has the advantages that compared with a traditional orthogonal laying scheme, the method can better fit the loaded working condition of a product, the stress level of a membrane disc can be reduced, and the utilization rate of a fiber material is increased.

The invention discloses a method for separating cochlea related cells in situ based on a patch clamp system. The method comprises the following steps: contacting an electrode with a target single cell under a microscope, and carrying out in-situ grabbing on the target single cell through negative pressure adsorption; the target single cell and surrounding cells are kept in a connection state before in-situ grabbing; before the electrode approaches the target single cell, positive pressure is continuously applied, and when the electrode is in contact with the surface of the target single cell, the positive pressure is instantly stopped and switched to negative pressure. According to the method provided by the invention, high-quality cochlea related cells can be obtained in situ for deep sequencing analysis, and the method can be used for basic research and accurate diagnosis and treatment of clinical hearing impairment, and has a good application prospect.

This invention discloses a welding method for fabricating a three-dimensional reinforced steel / aluminum welded joint on a steel surface, belonging to the field of dissimilar metal welding technology. This invention employs laser selective melting to fabricate a three-dimensional geometric structure on the surface of a steel substrate, forming a surface with a high aspect ratio and high specific surface area. By using brazing or fusion brazing methods, the bonding area between the liquid aluminum and the steel plate and the three-dimensional geometric structure is greatly increased, effectively suppressing crack propagation and achieving a dual enhancement of the strength and toughness of the steel / aluminum dissimilar metal joint. This method increases the specific surface area of ​​the steel / aluminum joint interface, improving sliding resistance under external loads, while the three-dimensional geometric structure itself bears some of the stress. Simultaneously, the three-dimensional geometric interface structure can alleviate joint interface stress and improve stress distribution, which is beneficial for obtaining a welded joint with good performance.

The invention discloses a four-point mounting structure of a narrow-space aircraft engine. Comprising an outer main installation section (1) and an inner main installation section (2) which are installed on a front fuselage frame, a transverse pulling assembly installed on a rear fuselage frame (39), and an inclined pulling assembly installed on a rear fuselage middle partition plate (40). The rear fuselage frame (39) and the rear fuselage middle partition plate (40) are located on the same cross section. The outer and inner main mounting sections (1) are respectively connected with outer and inner main mounting section joints on the engine; and the transverse and inclined pulling assemblies are respectively connected with an upper hanging joint (28) and an inclined hanging joint on the engine. The stress level of engine mounting parts can be reduced, and the comfort of a driver can be effectively improved.

This invention provides a discrete mold two-stage progressive forming device and method. The split upper module includes multiple independent upper mold blocks. Each upper mold block has a central step structure and side step structures. Initially, the upper surfaces of the side step structures of the multiple upper mold blocks are at the same height, while the upper surfaces of the central step structures of the multiple upper mold blocks gradually decrease in height from the center to both sides, forming a stepped shape. The hydraulic auxiliary device includes a central pressure block, side pressure blocks, a central pressure head, and side pressure heads. The central pressure block corresponds to the central step structure; the side pressure blocks correspond to the side step structures; the central pressure head is connected to the central pressure block and can drive the central pressure block to move up and down; the side pressure head is connected to the side pressure block and can drive the side pressure block to move up and down. This invention solves the problem that high-strength steel parts with multi-arc variable cross-sections are difficult to produce using traditional forming processes.

This invention discloses a method for controlling the residual stress gradient in the working layer of a cold-rolled forged steel work roll, comprising gradient induction hardening, gradient spray cooling, cryogenic treatment, and a stepped tempering process. Gradient induction hardening uses a variable frequency / variable power continuous induction heating method to heat the roll body, thereby constructing a smooth transition zone. Gradient spray cooling divides the spray area along the roll body axially into 3 to 7 independently controlled cooling zones; the spray pressure in each cooling zone gradually decreases from top to bottom. The stepped tempering process includes three stages of tempering and heat preservation. This invention achieves a smooth transition of radial cross-sectional stress by constructing a gradient transition layer during the quenching stage, precisely controlling the microstructure transformation during the cryogenic stage, and employing a multi-stage stress release process during the tempering stage, thereby reducing the overall stress level of the working layer while maintaining high hardness.

The utility model belongs to the technical field of structural strength analysis, and particularly relates to a split type flange connecting piece for balancing torsional moment, which comprises a pin shaft, a flange, a flap rib web, a first connecting bolt, a second connecting bolt and a flap driving structure, a through hole of which the axis is vertical to that of the pin shaft is formed in the cylindrical surface of the pin shaft; the flange is provided with a cylinder used for installing a pin shaft and a flange edge located at one end of the cylinder, and the cylinder is provided with an installation through hole with the axis perpendicular to the axis of the cylinder. The pin shaft is inserted into a cylinder of the flange, the first connecting bolt penetrates through a flange mounting through hole to be axially fixed with a through hole of the pin shaft, the flange is fixed on a flap rib web through the second connecting bolt, and the pin shaft is fixedly connected with a flap driving structure.

The present application relates to the technical field of rocket engine test device, and particularly relates to a combined self-tight sealing structure for the head of a thrust chamber, which is used for sealing the head of the thrust chamber during testing; the combined self-tight sealing structure comprises a first sealing assembly, a second sealing assembly and a third sealing assembly; the first sealing assembly and the second sealing assembly both form annular sealing surfaces on the head of the thrust chamber, and the sealing surfaces of the first sealing assembly, the second sealing assembly and the third sealing assembly are sequentially arranged from outside to inside, and jointly seal the head of the thrust chamber; the first sealing assembly transmits a test load to the flange of the head of the thrust chamber, the second sealing assembly transmits the test load to the back of the flange of the head of the thrust chamber, and the third sealing assembly transmits the test load to the base of the test device; the high-pressure load during testing acts on the first sealing assembly, the second sealing assembly and the third sealing assembly respectively, thereby improving the safety factor of each sealing assembly and reducing the stress level of the sealing member under high-pressure test conditions.

The invention provides a wearable microneedle ear tag for animal heat stress management, the wearable microneedle ear tag comprises a female nail and a main body, the female nail comprises a detection disc, and the detection disc is provided with a microneedle electrode. The microneedle electrodes comprise a first working microneedle electrode, a second working microneedle electrode, a third working microneedle electrode, a reference microneedle electrode and a temperature sensing microneedle electrode. The temperature, pH, K + concentration and Ca < 2 + > concentration level of animal ear interstitial fluid can be monitored at the same time, and the physiological status of animals under the heat stress condition is comprehensively evaluated. According to the microneedle technology, the sensor can be more flexibly applied to animals of different types and sizes, wider application possibility is provided, the design of the microneedle is relatively small and light, invasive interference to the animals is reduced, stress to the animals is reduced, and the microneedle sensor is suitable for being worn by the animals for a long time.

This utility model discloses a plastic-coated steel pipe bend joint suitable for low-temperature conditions, comprising a bend section and straight pipe sections welded to both ends, forming a bend structure. It also includes: a stress buffer device comprising a corrugated compensator welded to the junction of the bend section and the straight pipe section, and a flow-damping orifice plate connected to the other end face of the corrugated compensator; and a damping sliding pair comprising a damping sliding tube fixed to the outer wall of the flow-damping orifice plate and a fixed damping kit fitted into the inner wall of the straight pipe section. The end face of the corrugated compensator connected to the flow-damping orifice plate is a free end that slides axially along the straight pipe section, and the damping sliding tube and the fixed damping kit achieve a sliding seal through an elastic seal. This utility model uses the sealing gas, the elastic material in the corrugated compensator, and the friction generated by the relative sliding of the damping sliding tube and the fixed damping kit to jointly counteract the pressure caused by frost heave, making the joint fully adaptable to low-temperature conditions.

The application discloses a tendon post-processing method for a robot dexterous hand and application thereof and belongs to the technical field of tendons. 3 ‑10 4 times of dynamic loading-unloading cycles; step 2, the tendon to be processed is tensioned at 30% of the rated load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, is then warmed to room temperature at a rate of 5-8 DEG C / min, is again tensioned at the working load, is placed in liquid nitrogen at-196 DEG C for cryogenic treatment for 2-8 hours, and is then warmed to room temperature at a rate of 5-8 DEG C / min. The application eliminates the tiny internal stress or structural relaxation existing in the tendon after twisting and improves the structural stability of the tendon. In addition, the application completely releases the internal stress of the tendon, reduces the overall stress level of the tendon and improves the fatigue performance of the tendon.

The invention discloses a fabricated building steel structure, and belongs to the field of steel structures. An assembly type building steel structure comprises a box type high-strength steel column, and further comprises a fixing frame fixed to the bottom end of the box type high-strength steel column, a fixing sleeve, a mounting sleeve fixed to one side of the fixing sleeve, a positioning structure arranged in a cross beam, a fixing structure, supporting structures arranged on the two sides of the positioning structure, and a connecting structure arranged between the fixing structure and the positioning structure. The support is arranged between the two cross beams; the rotating block is used for driving the rotating arm frame to rotate, the rotating arm frame pushes the positioning pin through the pushing arm, the positioning pin can move in the second positioning groove and the first positioning groove, the positions of the box type high-strength steel column, the fixing sleeve and the cross beam are fixed, the assembling process is greatly facilitated, the construction time is remarkably shortened, and the construction efficiency is improved. According to the construction method, the site operation and manpower requirements are reduced, meanwhile, the quality and the process stability can be ensured, and the material waste and reworking conditions in construction are reduced.

The present invention discloses a streamlined wear-resistant liner and a mill cylinder. The streamlined wear-resistant liner includes a liner body, including a liner body, a first transition surface is arranged between a first lifting surface and a first crushing surface, the first transition surface is a first curved surface, and the conductor of the first curved surface is a curved segment of an ellipse or a circle; a second transition surface is arranged between the second lifting surface and the second crushing surface, the second transition surface is a second curved surface, and the conductor of the second curved surface is a curved segment obtained in an ellipse or a circle. The mill cylinder is assembled by assembling the streamlined wear-resistant liner. After contact analysis and stress intensity factor analysis of the V-notch, the lifting surface-crushing surface collision angle adopts an elliptical curved surface transition, which has a lower stress level, and the liner is safer and less prone to cracks. There is a tendency for the crack to open when the broken line transitions, while the cracks in the liner with the arc transition tend to close. Obviously, cracks with a closing trend are not easy to expand.

A vibration reduction component, a drone and a vibration reduction method for a drone, the vibration reduction component comprising a sensor, a processor, an actuator and a mass damping stiffener; the sensor is installed at the vibration part of the drone, used to detect the vibration of the drone and output a vibration signal; the processor is electrically connected to the sensor, used to process the vibration signal and output a control signal; the actuator is electrically connected to the processor, used to perform an action according to the control signal; the mass damping stiffener is installed to the drone and connected to the actuator, the action performed by the actuator acts on the mass damping stiffener, so that the mass damping stiffener produces a displacement in the opposite direction of the vibration direction of the drone, so as to reduce the vibration of the drone. Any type of vibration of any drone can be reduced, which can reduce the stress level of the key structural parts of the drone and reduce the risk of drone failure.

This invention discloses a fusion reactor divertor tube-plate composite module and cooling target plate structure, relating to the field of magnetic confinement fusion divertor technology. The composite module includes a plasma-facing component and a transition layer. The plasma-facing component is located on the periphery and is used for contact with the plasma. A through-hole matching the transition layer is provided in the plasma-facing component. The transition layer is metallurgically connected within the through-hole, and a cooling pipe is metallurgically connected within the transition layer. Coolant flows through the cooling pipe to remove heat generated by fusion. The outer side of the transition layer has a U-shaped structure with a flat top and a round bottom, while the inner side has a circular structure. This design effectively increases the weight ratio of the transition layer to the plasma-facing component, improving the overall thermal conductivity of the composite module, alleviating stress and strain concentration problems, and ensuring the safety of the divertor target plate module, preventing the target plate material from detaching and contaminating the reactor core plasma under high heat loads.

The invention belongs to the technical field of high-temperature pipeline installation, and particularly relates to a high-temperature pipeline cold-state pre-stretching installation method which comprises the following steps: S1, cold-state pre-stretching stress calculation; s2, on-site anchor point condition confirmation; s3, preparation before construction; s4, measuring and cutting at a pre-stretching pipe orifice; s5, the lifting lug and the guide plate are welded; s6, cold-state pre-stretching is conducted, and welded junctions are assembled; s7, reinforcing the welded junction of the pipeline and dismantling the pre-tensioning device; s8, formally welding a pipeline welding seam; and S9, nondestructive testing is conducted, and reinforcing facilities are dismantled. Pretension force is applied to the pipeline in advance, so that deformation of the pipeline in a thermal state can be controlled to a certain degree, thrust and torque of the pipeline to equipment are reduced, the stress level of the pipeline is reduced, safety and reliability of the pipeline are improved, meanwhile, use of expansion joints and compensators is reduced, and the production cost of enterprises is effectively reduced; and moreover, the device can be suitable for construction sites with compact spaces, the construction difficulty is effectively reduced, and the construction efficiency is improved.

The application discloses a kind of carbon dioxide geological storage well cementing anticorrosion additive and application.The anticorrosion additive includes the following weight parts of each component: 40~50 parts of rice hull ash, 30~50 parts of alkali-soluble acrylic resin powder, 10~30 parts of silica ash and 5~15 parts of fiber.The anticorrosion additive can significantly reduce the chemical corrosion effect of carbon dioxide on the cement stone and the stress corrosion effect under the coupling condition of stress by densification, alkali reduction, toughening and other comprehensive effects, can effectively improve the anticorrosion ability of carbon dioxide geological storage well cementing cement sheath, ensure the integrity of wellbore sealing.

The application discloses a bag type recyclable pressure type anchor rod, which comprises an anchor head anchor, a rod body, a bearing body and an anchoring body. The rod body comprises a steel strand and a protective sleeve, the protective sleeve is sleeved on the periphery of the steel strand, the bearing body is connected with the steel strand at the end of the rod body, and the anchoring body comprises a cement soil anchoring body and a cement slurry anchoring body. The cement soil anchoring body is formed by high-pressure rotary jet grouting process of cement slurry and surrounding soil, and the cement slurry anchoring body is formed by injecting cement slurry into a bag around the rod body through a reserved grouting pipe. The anchor rod makes the shear stress distribution of the anchoring body and the soil interface more uniform, effectively prevents the cement soil anchoring body from being damaged under pressure, and fully plays the bearing performance of the anchoring body. The application also provides a bearing capacity calculation method of the bag type recyclable pressure type anchor rod, which can obtain the limit bearing capacity data of the anchor rod concisely, efficiently and accurately.

The utility model discloses a kind of mobile phone screen module, it is related to screen module technical field, including outer screen, inner screen and the OCA glue layer being set between outer screen and inner screen, the inner screen is attached on the back of outer screen by OCA glue layer;Along the outer screen back periphery is equipped with stepped groove, the stepped groove includes the first step groove and the second step groove being connected, the first step groove is close to outer screen edge position, the second step groove is set in the first step groove inside, silk printing layer is equipped in the second step groove, to form the silk printing frame acting on outer screen by silk printing layer, wherein, the OCA glue layer is attached on the back of silk printing layer, the surface of first step groove and the back of outer screen located outside stepped groove;Effectively protect the silk printing layer, reduce its abrasion, cracking risk due to external force impact to some extent, to guarantee the integrity of silk printing frame and the long-term reliability of screen.

The application discloses a box, a battery device and a vehicle. The box comprises a bottom plate and a frame. The frame is arranged around the periphery of the bottom plate and defines a containing space. A first beam is arranged in the containing space. The first beam extends in a first direction and is connected to the frame in a second direction to divide the containing space into an electrical area and an energy area. The bottom plate comprises an energy area bottom plate and an electrical area bottom plate. The frame comprises a first frame arranged opposite in the first direction and a second frame arranged opposite in the second direction. The second frame, the electrical area bottom plate and the first beam that participate in defining the electrical area are configured as an integral piece. Thus, the force bearing interface can be expanded, the structural rigidity of the box, especially the bending and torsional rigidity, can be significantly improved, the structural rigidity and the anti-vibration fatigue performance of the box can be improved, the rigidity and the modal main frequency of the battery device can be improved, the deformation amplitude of the box structure in the vibration process can be reduced, the stress level can be reduced, and the fatigue strength can be improved.