Optimization of Damper Top Mount Characteristics to Improve Vehicle Ride Comfort and Harshness

Kaldas, Mina M.S.; Çalışkan, Kemal; Henze, Roman; Küçükay, Ferit

doi:10.1155/2014/248129

Cited by 13 publications

(16 citation statements)

References 14 publications

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“…By selecting the passenger ride comfort with frequency content consideration as the key performance index, the other important performance measures including the suspension travel, the tyre load and the high-frequency dynamic stiffness are imposed as hard constraints that the resulting suspension configurations must provide equivalent or better level of performance as the conventional one. In addition, a damper top mount, commonly used in vehicles to provide ideal Noise-Vibration-Harshness (NVH) performance [21], is also included in the considered quarter-car model. This paper is structured as follows.…”

Section: Introductionmentioning

confidence: 99%

Ride comfort enhancement for passenger vehicles using the structure-immittance approach

Zhang

Zhu

et al. 2019

Vehicle System Dynamics

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This paper investigates the ride comfort enhancement potential for passenger vehicles by employing inerter-spring-damping suspension struts. The inerter has been used on Formula 1 racing cars and several beneficial devices incorporating inerters have also been identified for ride comfort enhancement. However, previous investigations either were limited to simple network configurations with moderate performance improvement, or resulted in complicated configurations with a large number of elements which are impractical for real-life applications. In addition, some important practical performance constraints have not been taken into consideration, such as high-frequency dynamic stiffness which influences the NVH performance, and frequency content consideration of the sprung mass acceleration which more directly relates to passenger perception. In this paper, a quarter-car model including top mount is studied, with the performance of a conventional suspension strut presented as baseline. The structure-immittance approach, which can cover all networks with predetermined numbers of each element type is adopted for identifying the optimal suspension configurations. Several configurations with up to a 13.3% performance improvement are identified with other practical performance indices to be no worse than the baseline. The suspension configurations proposed in previous works are also considered for a sake of comparison, demonstrating significant advantages of the structure-immittance approach. Subsequently, a sensitivity analysis against the sprung and unsprung mass changes is carried out, which represents cargo and tyre weight variations, respectively. Time domain response and other reality checks are then conducted for the out-performing configurations, which reconfirm the ride comfort enhancement and ensure no unexpected behaviour occurs.

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Section: Introductionmentioning

confidence: 99%

Ride comfort enhancement for passenger vehicles using the structure-immittance approach

Zhang

Zhu

et al. 2019

Vehicle System Dynamics

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“…Ride comfort and harshness performance of the vehicle can be improved by optimizing the characteristics of the suspension system components [4]. ere is some related work that can be found in the literature about optimizing techniques in automotive applications, specifically in suspension components.…”

Section: Introductionmentioning

confidence: 99%

“…is method is particularly suited where there is no relationship between the objective function and the design variables. Kaldas et al [4] developed an optimization technique to improve vehicle ride comfort and harshness using a genetic algorithm to determine the optimum damper top mount characteristics. Li et al [5] performed a genetic algorithm to find the optimal coordinates of hard points, which are the key locations to influence on suspension characteristics depending on their relative orientations, on a double-wishbone type suspension system.…”

Section: Introductionmentioning

confidence: 99%

Analytical Design and Optimization of an Automotive Rubber Bushing

Rivas-Torres

Tudón-Martínez

Lozoya-Santos

et al. 2019

Shock and Vibration

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The ride comfort, driving safety, and handling of the vehicle should be designed and tuned to achieve the expectations defined in the company’s design. The ideal method of tuning the characteristics of the vehicle is to modify the bushings and mounts used in the chassis system. To deal with the noise, vibration and harshness on automobiles, elastomeric materials in mounts and bushings are determinant in the automotive components design, particularly those related to the suspension system. For most designs, stiffness is a key design parameter. Determination of stiffness is often necessary in order to ensure that excessive forces or deflections do not occur. Many companies use trial and error method to meet the requirements of stiffness curves. Optimization algorithms are an effective solution to this type of design problems. This paper presents a simulation-based methodology to design an automotive bushing with specific characteristic curves. Using an optimum design formulation, a mathematical model is proposed to design and then optimize structural parameters using a genetic algorithm. To validate the resulting data, a finite element analysis (FEA) is carried out with the optimized values. At the end, results between optimization, FEA, and characteristic curves are compared and discussed to establish the correlation among them.

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“…As for comfort evaluation of road vehicles, the most significant standards are the VDI 205, ISO 2631 and UNI ENV 12299. In Kaldas et al’s 2 research, the ride comfort and the harshness of a quarter vehicle were evaluated by analyzing the body acceleration at different frequency ranges. Goncalves and Ambrósio 3 applied ISO 2631 vibration tolerance criterion, which was weighted RMS acceleration values.…”

Section: Introductionmentioning

confidence: 99%

“…A parametric study based on the mathematical vehicle model was presented in which the parameters of the tire and suspension have an influence on the vibration of the vehicle. In Kaldas et al’s 2 study, a generic quarter vehicle suspension model including a damper top mount model was established. The vehicle was modeled as a 2-DOF system consisting of two masses which represent the body and wheel.…”

Section: Introductionmentioning

confidence: 99%

Damaged-aircraft trailer dynamics simulation and vibration optimization

Hong

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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As a rescue vehicle, damaged-aircraft trailer is used to move damaged aircraft quickly to restore the normal order of the airport. Several damaged-aircraft trailer parameters such as tire stiffness and damping of the suspension hydraulic system influence the dynamic performance significantly. In this article, a simplified 9 degrees of freedom model of damaged-aircraft trailer is established considering the physical parameters of suspension and tires. The relationships among the parameters of the suspension hydraulic components, the elastic force and damping force are established, and then the optimization model of the whole vehicle is obtained. In order to reduce the secondary damage to the aircraft, the multi-island genetic algorithm is used to optimize the suspension system and tire. During the calculation, the maximum vertical acceleration of damaged-aircraft trailer is taken as objective function for variable parameters of the suspension hydraulic system and the tire. As a result, the performance of the vehicle is greatly improved with the maximum acceleration of 0.2 m/s2 after optimization.

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Optimization of Damper Top Mount Characteristics to Improve Vehicle Ride Comfort and Harshness

Cited by 13 publications

References 14 publications

Ride comfort enhancement for passenger vehicles using the structure-immittance approach

Ride comfort enhancement for passenger vehicles using the structure-immittance approach

Analytical Design and Optimization of an Automotive Rubber Bushing

Damaged-aircraft trailer dynamics simulation and vibration optimization

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