Resonant and bifurcation oscillations of the rod, taking into account the resistance forces and relaxation properties of the medium

2018 ◽  
pp. 124-132
Author(s):  
A. Eremin ◽  
◽  
V. Zhukov ◽  
V. Kudinov ◽  
I. Kudinov ◽  
...  
Keyword(s):  
Relaxation Properties ◽  
Resistance Forces

Resonant and Bifurcation Oscillations of the Rod with Regard to the Resistance Forces and Relaxation Properties of the Medium

2018 ◽  
Vol 53 (5) ◽  
pp. 584-590
Author(s):  
A. V. Eremin ◽  
V. V. Zhukov ◽  
V. A. Kudinov ◽  
I. V. Kudinov
Keyword(s):  
Relaxation Properties ◽  
Resistance Forces

IMPROVEMENT OF THE HYDRAULIC EXCAVATOR BUCKET DESIGN

2019 ◽  
Vol 16 (3) ◽  
pp. 202-213 ◽  
Author(s):  
G. G. Buriy ◽  
V. S. Shherbakov ◽  
S. B. Skobelev ◽  
V. F. Kovalevskiy
Keyword(s):  
Cost Reduction ◽  
Production Costs ◽  
Hydraulic Excavator ◽  
Engineering Structures ◽  
Excavator Bucket ◽  
Productivity Increase ◽  
Hydraulic Excavators ◽  
Reducing Costs ◽  
Rational Operation ◽  
Resistance Forces

Introduction.Construction of engineering structures is impossible without building and road machines. The large volume of financing is allocated for such machines’ purchase. The main ways of reducing costs of the equipment consist in more rational operation of the equipment and also in decrease of equipment’s cost by constructive changes. The paper demonstrates the new design of the single-bucket hydraulic excavator with smaller cost.Materials and methods.The main ways of cost reduction for construction machines are more rational operation and depreciation of a design with the required characteristics’ maintaining. The paper describes constructive changes of the working equipment of the single-bucket hydraulic excavator, which allow decreasing the production costs.Results.The authors describe the new bucket design of the single-bucket hydraulic excavator. Moreover, the authors carry out the analysis of the existing buckets’ design. The paper also illustrates the functioning on bucket forces while digging process. The authors describe the solutions of the problem for productivity increase of the single-bucket in hydraulic excavators. In addition, the authors make the scheme of the bucket loading while digging process. Such scheme helps to reduce resistance forces of digging.Discussion and conclusions.As a result, the paper presents the design of the working equipment of the hydraulic excavator’s single-bucket, which allows reducing resistance forces of digging. Such results would help to establish buckets of bigger capacity and would lead to the productivity increase.

WRM ALLOY C15500

Alloy Digest ◽  
1999 ◽  
Vol 48 (10) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Copper Alloy ◽  
Heat Treating ◽  
Rolling Mills ◽  
Relaxation Properties

Abstract WRM Alloy C15500 is a copper alloy with one of the best combinations of electrical, mechanical, and relaxation properties. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: CU-616. Producer or source: Waterbury Rolling Mills Inc. Originally published May 1998, corrected October 1999.

Relaxation Properties of Terrace Boards Containing the Combinated Wood and Mineral Fillers

2019 ◽  
Vol 768 (3) ◽  
pp. 57-63
Author(s):  
A.A. ASKADSKII ◽  
◽  
A.V. MATSEEVICH ◽  
K.S. PIMINOVA ◽  
O.A. GORBACHEVA ◽  
...  
Keyword(s):  
Relaxation Properties ◽  
Mineral Fillers

The relaxation properties of PbTiO3 ceramic and its 0-3 composite materials in microwave frequency

2001 ◽  
Vol 264 (1) ◽  
pp. 3-8
Author(s):  
Zhai Jiwei ◽  
Yao Xi ◽  
Wu Mingzhong ◽  
Zhang Liangying
Keyword(s):  
Composite Materials ◽  
Microwave Frequency ◽  
Relaxation Properties ◽  
Pbtio3 Ceramic

scholarly journals Health-Related Social and Ethical Considerations towards the Utilization of Dental Medical Services by Seniors: Influencing and Protective Factors, Vulnerability, Resilience and Sense of Coherence

2021 ◽  
Vol 18 (4) ◽  
pp. 2048
Author(s):  
Ina Nitschke ◽  
Sebastian Hahnel ◽  
Julia Jockusch
Keyword(s):  
Oral Health ◽  
Protective Factors ◽  
Healthcare System ◽  
Sense Of Coherence ◽  
Influencing Factor ◽  
Patient Specific ◽  
Dental Services ◽  
Health Related ◽  
Utilization Of Dental Services ◽  
Resistance Forces

The aim is to analyze protective and modifying factors (e.g., vulnerability, resilience, sense of coherence) in relation to the utilization of dental services by seniors at different levels of the healthcare system. Terminological imprecision in the use and transfer of existing terms (sense of coherence, resilience, salutogenesis) to gerodontology is clarified. Factors influencing a reduced utilization (static/dynamic factors) can occur isolated or in combination and, thus, model the risk of a reduced utilization of dental services (influencing-factor mechanism). Protective factors of utilization include patient-specific factors for self-motivation and factors that promote oral-health-related resilience. Resistance forces that counteract can be identified as oral-health-related resilience factors. Achieving social and individual appreciation and establishing a prevention-oriented approach to utilization will be increasingly challenging, since the population is becoming older and access is not equal in terms of opportunity. Resistance forces need to be strengthened in an ethical context. Studies should increasingly present resilience processes, determinants and modes of action at the various interfaces in the healthcare system, which can ensure sustainable medical care in old age. The concepts conveyed here are generally valid and able to point out inequalities and ageism in access to dental services.

scholarly journals Estimation of resistance force at steady-state sinkage for cylindrical wheel-typed lunar/planetary exploration rovers with function of push–pull locomotion

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Daisuke Fujiwara ◽  
Naoki Tsujikawa ◽  
Tetsuya Oshima ◽  
Kojiro Iizuka
Keyword(s):  
Steady State ◽  
Estimation Method ◽  
Planetary Exploration ◽  
Experimental Result ◽  
Resistance Force ◽  
Estimation Model ◽  
Loose Soil ◽  
Key Factor ◽  
The Relationship ◽  
Resistance Forces

Abstract Planetary exploration rovers have required a high traveling performance to overcome obstacles such as loose soil and rocks. Push-pull locomotion rovers is a unique scheme, like an inchworm, and it has high traveling performance on loose soil. Push-pull locomotion uses the resistance force by keeping a locked-wheel related to the ground, whereas the conventional rotational traveling uses the shear force from loose soil. The locked-wheel is a key factor for traveling in the push-pull scheme. Understanding the sinking behavior and its resistance force is useful information for estimating the rover’s performance. Previous studies have reported the soil motion under the locked-wheel, the traction, and the traveling behavior of the rover. These studies were, however, limited to the investigation of the resistance force and amount of sinkage for the particular condition depending on the rover. Additionally, the locked-wheel sinks into the soil until it obtains the required force for supporting the other wheels’ motion. How the amount of sinkage and resistance forces are generated at different wheel sizes and mass of an individual wheel has remained unclear, and its estimation method hasn’t existed. This study, therefore, addresses the relationship between the sinkage and its resistance force, and we analyze and consider this relationship via the towing experiment and theoretical consideration. The results revealed that the sinkage reached a steady-state value and depended on the contact area and mass of each wheel, and the maximum resistance force also depends on this sinkage. Additionally, the estimation model did not capture the same trend as the experimental results when the wheel width changed, whereas, the model captured a relatively the same trend as the experimental result when the wheel mass and diameter changed.

基层档案揭示的农业合化作运动：以江苏省宝应县为例 1953–1957

Rural China ◽  
2016 ◽  
Vol 13 (2) ◽  
pp. 288-305
Keyword(s):  
Rural China ◽  
Jiangsu Province ◽  
Archival Data ◽  
Ordinary Sense ◽  
Government Officials ◽  
Traditional Methods ◽  
Depth Analysis ◽  
Political Struggles ◽  
Resistance Forces ◽  
Shed Light

Agricultural collectivization was a movement in the early 1950s that profoundly changed the traditional methods of production and lifestyle in rural China. Drawing on original archives from Baoying county of Jiangsu province, this article delves into the actual implementation of, and resistance by different stratum of the peasantry to, this movement. The wealth of archival data and details included in this study shed light on the multifaceted realities of the movement that have been obscured in past studies, in particular, the complexity of the mentality of the peasants and their various forms of resistance, as well as the efforts by government officials to divide and put down the resistance forces and carry out the state’s policies. These data further enable an in-depth analysis of the basic issues about agricultural collectivization. It is shown that this movement was more than a transformation of economic institutions in the ordinary sense; it involved intense political struggles. 上世纪五十年代初开始的农业合作化运动深深改变了中国农民传统的生产生活方式。本文以江苏省宝应县的原始档案为依据，试图从底层的角度探究这一运动的具体实施过程，以及各阶层农民对这一运动的真实反应。本文以大量数据和细节揭示了农业合作化运动的多重面相，特别是以往研究中被忽视的部分，如农民对这一运动的复杂心态和种种抗争，以及当政者如何分化瓦解各种反对力量、步步推进其政策的过程。基于这些事实，本文就农业合作化运动中存在的基本问题进行了讨论，并提出这场运动已经超越了一般经济制度的改革，其实质是一场严峻的政治斗争。 (This article is in Chinese.)

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