Classic design method of front stabilizer bar When the front stabilizer bar is used for independent suspension, the vertical force dFw, which is equal in magnitude and opposite in direction, is set at the ground point of the left and right wheels of the car, and the left and right wheels are under the action of the two forces. The vertical displacement is dfw, and the corresponding vertical force and displacement at the end of the stabilizer bar are dFb and dfb, respectively. Since the equivalent roll angle stiffness of the stabilizer bar at the wheel is considered at this time and the force of the spring in the suspension is not considered, the diameter D of the front stabilizer bar is generally determined by the following formula: Cφb=Cfw (fwfb) 2LB2(1)D=1283πCφbL2E[l13-a3+L2(a+b)2+4l2(b+c)] (2) where: Cφb—the angular stiffness of the stabilizer bar.
In the simple improvement design, using the above method requires analyzing the force and displacement, etc., and the calculation is rather complicated, so the method used to calculate the natural vibration frequency of the front stabilizer bar is selected.
Theory of Theoretical Calculation of Torsional Vibration Frequency In theory, the formula for the natural vibration frequency of the front transverse stabilizer bar is: fn = n2s2 x π2 x EIPA (3) where: n - frequency order; s - length of the bar, m; E - elastic modulus, take 2.1 × 1011Pa; I - circle section moment of inertia, I = π × D464, D is the diameter, m; P - density, 7800Kg/m3; A - circular cross-sectional area.
The basic parameters of the pre-prototype transverse stabilizer bar are substituted into equation (3), s = 1.725m, D = 0.02m. After calculation, the first-order torsional frequency of the theoretical prototype stabilizer bar is about 48.2Hz. Take the first-order torsional frequency Equally, calculated: After lengthening 60mm, the diameter of the circular section needs to be increased by 22mm.
Modal analysis of the front stabilizer bar The modern method of CAE analysis using Ansys software is simple and intuitive. In the improved design of the front stabilizer bar, a simplified model can be built in the UG software, as shown. Then import Ansys for modal analysis to solve.
Simplified Front Lateral Stabilizer Rod UG Model In Ansys, the imported UG model is modified to extract its centerline. Beam beam elements are used to define the cross-sectional shape, mainly the radius. The centerline is meshed and then the mold is Analysis.
The modal analysis was first performed on the prototype front stabilizer bar to understand its modal form and related stiffness information. Then in the UG software, the length of the front stabilizer bar model is lengthened by 60 mm. The amount of change in diameter is essentially the same as the first-order torsional modal stiffness before and after the change. The result of the solution is the horizontal direction after the change. The diameter of the stabilizer bar should be bolded to 22mm. Change the first-order torsional mode of the front and rear stabilizer bars, as shown in ～.
It can be seen from this that the first-order frequency of the 60mm thickened diameter to 22mm is 44.508Hz, which is very similar to the first-order frequency of the prototype. Therefore, after the stabilizer bar is extended, the diameter must be thickened to 22mm.
The first-order frequency of the first-order torsional modal improvement part (lengthened 60mm, bold diameter to 22mm) of the first-order torsional modal improvement part (lengthened 60mm) of the original part (1) In the improved design of the front stabilizer bar In addition to using classical theoretical design methods for calculations, modal analysis methods that use the principle of equalizing the first-order natural vibration frequency before and after improvement can also be used.
(2) In the modal analysis of the front stabilizer bar, two methods of theoretical calculation and An-sys analysis were used. After mutual comparison and verification, the results obtained by this method were accurate and reliable.
Jump Machinery (Shanghai) Limited is a modern high-tech joint stock enterprise specialized in the turnkey production line of concentrated juice, jam, pulp, tropical fruits, herb and tea beverages, carbonated drinks, wine, beer, yogurt, cheese, milk, butter etc. At the same time, Jump is also committed to manufacturing various food machinery, such as Can Food Machinery , Fruits Juice Machinery, Tomato Sauce Machinery, Fruits Jam Machinery, Dairy Machinery etc.
Jump is able to supply service from A to Z about your project, not only machine manufacturing, installation commissioning, technical training, after-sales service, but also before-sales service, including factory building construction drawings, facilities layout, and water, electricity, boiler steam. Jump has a professional team to help clients to design the layout on worksite and draft the implementation plan, program schedule and expense estimation in each stage of the project until the production line starts the project.
As an industry leader, it has the best projects, professional engineers and technicians, strong R&D department with a number of masters and PhD of food engineering & packaging machinery, stable long-term development and highly rated customer experience in every province in China and also in Africa, the Middle East, Southeast Asia, Oceania, Europe and America.
Wine Filling Production Line,Wine Filling Line Processing Line,Wine Filling Line Production Equipment,Wine Filling Line Machinery And Equipment
Jump Machinery (Shanghai) Limited , https://www.shanghaimachineries.com